NEET-PG 2024 — Forensic Medicine

Q: What is the sequence of rigor mortis in the human body?

Head to foot. ***Head to foot*** - Rigor mortis follows **Nysten's Law**, progressing in a **descending pattern** from head to feet. - Begins in smaller muscles with higher metabolic activity: **masseter (jaw), eyelids, and facial muscles** (2-4 hours post-mortem). - Then progresses to **neck → upper extremities → trunk → lower extremities** (completing over 12 hours). - This sequence relates to muscle size, ATP depletion rates, and surface area-to-volume ratios. *Centre to periphery* - This pattern does **not accurately describe** rigor mortis progression. - While smaller muscles are affected first, the progression follows a **craniocaudal (head-to-foot) direction**, not a radial center-to-periphery pattern. - The anatomical distribution is vertically sequential, not centrifugal. *Foot to head* - This is the **opposite of the established progression** described by Nysten's Law. - Lower extremity muscles develop rigor mortis **last**, not first. - This would contradict classic forensic pathology observations. *Simultaneously* - Rigor mortis is a **time-dependent sequential process**, not simultaneous. - Different muscle groups deplete ATP and accumulate calcium at **varying rates over several hours**. - The progressive nature (2-4 hours onset, 12 hours peak, 36-48 hours resolution) demonstrates it cannot be simultaneous. [Practice more Forensic Medicine PYQs on OnCourse]

Q: From a medico-legal perspective, in cases of sexual assault involving a female victim, what type of court proceeding is typically used to record medical evidence and testimony to protect the victim's privacy?

In camera proceedings. ***In camera proceedings*** - **In camera proceedings** (Latin for "in chambers") refer to court hearings conducted in **private**, with the public and media excluded, to protect the victim's privacy and dignity. - Under **Section 327(2) of CrPC**, cases of sexual offences against women must be conducted in camera to prevent further trauma and ensure the victim can provide testimony comfortably. - This legal provision ensures **confidentiality** of victim identity and prevents public disclosure of sensitive medical evidence and testimony. - The proceedings are still officially recorded and form part of the legal record, but occur in a closed, private setting. *Open court proceedings* - **Open court proceedings** allow public and media access, which would severely compromise the victim's privacy and cause additional psychological trauma. - Such public exposure is specifically prohibited in sexual assault cases under Indian law to protect the **victim's identity** and well-being. *Closed court proceedings* - While this term might seem similar, **"closed court"** is not the standard legal terminology used in Indian jurisprudence for sexual assault cases. - The specific term **"in camera"** is used in Section 327 CrPC and judicial pronouncements, making it the precise medico-legal answer. *Hearing at a different location* - Changing the location does not inherently provide the **legal framework** for privacy protection that in camera proceedings mandate. - This option lacks the formal legal status and procedural safeguards that Section 327 CrPC provides through in camera hearings. [Practice more Forensic Medicine PYQs on OnCourse]

Q: Police brought a person from a railway track with features of dry dilated pupils, dry skin, slurred speech, and altered sensorium. What is the most likely cause of poisoning?

Datura. ***Datura*** - **Datura poisoning** presents with anticholinergic symptoms including **dry dilated pupils**, **dry skin**, **tachycardia**, altered mental status (**altered sensorium**), and **slurred speech**. - The classic mnemonic "hot as a hare, blind as a bat, dry as a bone, red as a beet, mad as a hatter" describes the systemic effects of **anticholinergic toxidrome**. *Morphine* - **Opioid poisoning**, such as with morphine, typically causes **pinpoint pupils**, **respiratory depression**, and **CNS depression**. - Skin is usually **cool and clammy**, not dry. *Cannabis* - **Cannabis intoxication** typically causes **conjunctival injection** (red eyes), **tachycardia**, increased appetite, and euphoria or anxiety. - While it can alter perception, it generally does not lead to significantly **dilated pupils**, dry skin, or profound slurred speech in the manner seen with anticholinergics. *Alcohol* - **Alcohol intoxication** leads to **CNS depression**, slurred speech, ataxia, and sometimes nausea/vomiting. - **Pupils** are typically normal or slightly constricted, and the skin is often flushed and warm, not significantly dry or pale. [Practice more Forensic Medicine PYQs on OnCourse]

Q: A child was born 8 months after the father's death. The grandparents filed a case claiming that the baby is not their son's, but DNA testing confirmed paternity. What is the child called?

Posthumous child. ***Posthumous child*** - A **posthumous child** is one born after the death of its father. - In most legal systems, such a child is considered an heir and has rights equivalent to those born before the father's death, especially after paternity is confirmed. *Suppositious child* - A **suppositious child** is one who is falsely substituted for another, typically with the intent to defraud or claim an inheritance under false pretenses. - This term does not apply here as paternity was confirmed by DNA testing, indicating the child is genuinely linked to the deceased father. *Fabricated child* - The term **fabricated child** implies the child does not exist or was created through fraudulent means, often in the context of false claims or elaborate schemes. - In this scenario, the child is real and paternity has been verified, making "fabricated" an inaccurate description. *Illegitimate child* - An **illegitimate child** is historically defined as one born outside of marriage between its biological parents. - While the father died before the child's birth, the question does not provide information about the parents' marital status, and the term primarily refers to marital legality rather than the circumstances of the father's death. [Practice more Forensic Medicine PYQs on OnCourse]

Q: In a medicolegal examination, an 18-year-old male claims he is 16 years old. Which joint X-ray should be done to estimate his age?

Knee and wrist. ***Knee and wrist*** - **Bone age determination** using hand/wrist and knee radiographs is a standard method for estimating skeletal maturity across a wide age range, including late adolescence. - The **epiphyseal fusion** in these joints provides reliable indicators for age estimation up to and slightly beyond 18 years, particularly the **distal radius, ulna, and knee epiphyses**. *Head & shoulder* - While glenohumeral fusion occurs later, **skull sutures** are not reliable for precise age estimation in this age group, and shoulder fusion may not be as precise as wrist/knee for this specific age. - The **skull and shoulder** are generally not the primary sites chosen for age estimation in late adolescence due to less distinct and less consistent markers compared to other joints. *Elbow and ankle* - Although the elbow and ankle joints undergo fusion, the **wrist and knee provide a more comprehensive and widely validated set of ossification centers** for age estimation in the 16-18 year old range. - While useful, these sites may not offer the same level of detailed assessment for skeletal maturity as the combination of **wrist and knee**. *Elbow & hip* - **Hip fusion** (e.g., ilium, ischium, pubis) happens relatively early, making it less useful for distinguishing between 16 and 18 years old. - The **elbow alone** may not provide sufficient distinct markers for accurate age estimation in this specific late adolescent age group, unlike the wrist, which has multiple carpal and epiphyseal centers. [Practice more Forensic Medicine PYQs on OnCourse]

11 Previous Year Questions with Answers & Explanations

Questions

What is the sequence of rigor mortis in the human body?

From a medico-legal perspective, in cases of sexual assault involving a female victim, what type of court proceeding is typically used to record medical evidence and testimony to protect the victim's privacy?

Police brought a person from a railway track with features of dry dilated pupils, dry skin, slurred speech, and altered sensorium. What is the most likely cause of poisoning?

A child was born 8 months after the father's death. The grandparents filed a case claiming that the baby is not their son's, but DNA testing confirmed paternity. What is the child called?

In a medicolegal examination, an 18-year-old male claims he is 16 years old. Which joint X-ray should be done to estimate his age?

Which of the following is true regarding adipocere formation?

Who orders the autopsy in the case of a Road Traffic Accident (RTA)?

Mees' lines and raindrop pigmentation on the hands are seen in which type of poisoning?

A man presented with bilateral non-inflammatory edema after consuming a particular oil. Which test should be performed by the drug inspector to check for the adulterant?

Q10

A suspicious stain was treated with glacial acetic acid and heated. Examination shows the following crystalline finding. Which confirmatory test is being depicted?

NEET-PG 2024 - Forensic Medicine NEET-PG Practice Questions and MCQs

Question 1: What is the sequence of rigor mortis in the human body?

A. Centre to periphery
B. Head to foot (Correct Answer)
C. Foot to head
D. Simultaneously

Explanation: ***Head to foot*** - Rigor mortis follows **Nysten's Law**, progressing in a **descending pattern** from head to feet. - Begins in smaller muscles with higher metabolic activity: **masseter (jaw), eyelids, and facial muscles** (2-4 hours post-mortem). - Then progresses to **neck → upper extremities → trunk → lower extremities** (completing over 12 hours). - This sequence relates to muscle size, ATP depletion rates, and surface area-to-volume ratios. *Centre to periphery* - This pattern does **not accurately describe** rigor mortis progression. - While smaller muscles are affected first, the progression follows a **craniocaudal (head-to-foot) direction**, not a radial center-to-periphery pattern. - The anatomical distribution is vertically sequential, not centrifugal. *Foot to head* - This is the **opposite of the established progression** described by Nysten's Law. - Lower extremity muscles develop rigor mortis **last**, not first. - This would contradict classic forensic pathology observations. *Simultaneously* - Rigor mortis is a **time-dependent sequential process**, not simultaneous. - Different muscle groups deplete ATP and accumulate calcium at **varying rates over several hours**. - The progressive nature (2-4 hours onset, 12 hours peak, 36-48 hours resolution) demonstrates it cannot be simultaneous.

Question 2: From a medico-legal perspective, in cases of sexual assault involving a female victim, what type of court proceeding is typically used to record medical evidence and testimony to protect the victim's privacy?

A. Open court proceedings
B. Closed court proceedings
C. Hearing at a different location
D. In camera proceedings (Correct Answer)

Explanation: ***In camera proceedings*** - **In camera proceedings** (Latin for "in chambers") refer to court hearings conducted in **private**, with the public and media excluded, to protect the victim's privacy and dignity. - Under **Section 327(2) of CrPC**, cases of sexual offences against women must be conducted in camera to prevent further trauma and ensure the victim can provide testimony comfortably. - This legal provision ensures **confidentiality** of victim identity and prevents public disclosure of sensitive medical evidence and testimony. - The proceedings are still officially recorded and form part of the legal record, but occur in a closed, private setting. *Open court proceedings* - **Open court proceedings** allow public and media access, which would severely compromise the victim's privacy and cause additional psychological trauma. - Such public exposure is specifically prohibited in sexual assault cases under Indian law to protect the **victim's identity** and well-being. *Closed court proceedings* - While this term might seem similar, **"closed court"** is not the standard legal terminology used in Indian jurisprudence for sexual assault cases. - The specific term **"in camera"** is used in Section 327 CrPC and judicial pronouncements, making it the precise medico-legal answer. *Hearing at a different location* - Changing the location does not inherently provide the **legal framework** for privacy protection that in camera proceedings mandate. - This option lacks the formal legal status and procedural safeguards that Section 327 CrPC provides through in camera hearings.

Question 3: Police brought a person from a railway track with features of dry dilated pupils, dry skin, slurred speech, and altered sensorium. What is the most likely cause of poisoning?

A. Morphine
B. Cannabis
C. Datura (Correct Answer)
D. Alcohol

Explanation: ***Datura*** - **Datura poisoning** presents with anticholinergic symptoms including **dry dilated pupils**, **dry skin**, **tachycardia**, altered mental status (**altered sensorium**), and **slurred speech**. - The classic mnemonic "hot as a hare, blind as a bat, dry as a bone, red as a beet, mad as a hatter" describes the systemic effects of **anticholinergic toxidrome**. *Morphine* - **Opioid poisoning**, such as with morphine, typically causes **pinpoint pupils**, **respiratory depression**, and **CNS depression**. - Skin is usually **cool and clammy**, not dry. *Cannabis* - **Cannabis intoxication** typically causes **conjunctival injection** (red eyes), **tachycardia**, increased appetite, and euphoria or anxiety. - While it can alter perception, it generally does not lead to significantly **dilated pupils**, dry skin, or profound slurred speech in the manner seen with anticholinergics. *Alcohol* - **Alcohol intoxication** leads to **CNS depression**, slurred speech, ataxia, and sometimes nausea/vomiting. - **Pupils** are typically normal or slightly constricted, and the skin is often flushed and warm, not significantly dry or pale.

Question 4: A child was born 8 months after the father's death. The grandparents filed a case claiming that the baby is not their son's, but DNA testing confirmed paternity. What is the child called?

A. Suppositious child
B. Fabricated child
C. Posthumous child (Correct Answer)
D. Illegitimate child

Explanation: ***Posthumous child*** - A **posthumous child** is one born after the death of its father. - In most legal systems, such a child is considered an heir and has rights equivalent to those born before the father's death, especially after paternity is confirmed. *Suppositious child* - A **suppositious child** is one who is falsely substituted for another, typically with the intent to defraud or claim an inheritance under false pretenses. - This term does not apply here as paternity was confirmed by DNA testing, indicating the child is genuinely linked to the deceased father. *Fabricated child* - The term **fabricated child** implies the child does not exist or was created through fraudulent means, often in the context of false claims or elaborate schemes. - In this scenario, the child is real and paternity has been verified, making "fabricated" an inaccurate description. *Illegitimate child* - An **illegitimate child** is historically defined as one born outside of marriage between its biological parents. - While the father died before the child's birth, the question does not provide information about the parents' marital status, and the term primarily refers to marital legality rather than the circumstances of the father's death.

Question 5: In a medicolegal examination, an 18-year-old male claims he is 16 years old. Which joint X-ray should be done to estimate his age?

A. Head & shoulder
B. Elbow and ankle
C. Knee and wrist (Correct Answer)
D. Elbow & hip

Explanation: ***Knee and wrist*** - **Bone age determination** using hand/wrist and knee radiographs is a standard method for estimating skeletal maturity across a wide age range, including late adolescence. - The **epiphyseal fusion** in these joints provides reliable indicators for age estimation up to and slightly beyond 18 years, particularly the **distal radius, ulna, and knee epiphyses**. *Head & shoulder* - While glenohumeral fusion occurs later, **skull sutures** are not reliable for precise age estimation in this age group, and shoulder fusion may not be as precise as wrist/knee for this specific age. - The **skull and shoulder** are generally not the primary sites chosen for age estimation in late adolescence due to less distinct and less consistent markers compared to other joints. *Elbow and ankle* - Although the elbow and ankle joints undergo fusion, the **wrist and knee provide a more comprehensive and widely validated set of ossification centers** for age estimation in the 16-18 year old range. - While useful, these sites may not offer the same level of detailed assessment for skeletal maturity as the combination of **wrist and knee**. *Elbow & hip* - **Hip fusion** (e.g., ilium, ischium, pubis) happens relatively early, making it less useful for distinguishing between 16 and 18 years old. - The **elbow alone** may not provide sufficient distinct markers for accurate age estimation in this specific late adolescent age group, unlike the wrist, which has multiple carpal and epiphyseal centers.

Question 6: Which of the following is true regarding adipocere formation?

A. Preservation by saponification (Correct Answer)
B. High temperature needed
C. Cool and dry climate needed
D. Occurs within minutes to hours

Explanation: ***Preservation by saponification*** - Adipocere, also known as **grave wax**, is formed through the process of **saponification**, where body fat hydrolyzes into fatty acids. - This process leads to the formation of a **waxy, grayish-white substance** that can preserve the body tissues. *High temperature needed* - Adipocere formation is actually favored by **cooler temperatures**, which slow down putrefaction and create a more conducive environment for saponification. - **High temperatures** typically accelerate decomposition, making adipocere formation less likely. *Cool and dry climate needed* - While a **cool environment** is favorable, adipocere formation primarily requires a **moist or wet environment**, such as burial in damp soil or immersion in water. - A **dry climate** would generally lead to mummification rather than adipocere formation. *Occurs within minutes to hours* - Adipocere formation is a **slow process** that usually takes **several weeks to months** (typically 3 weeks to 3 months) to become evident, and even longer to fully develop. - It does not occur within minutes or hours, which is the timeframe for early post-mortem changes like livor mortis or rigor mortis.

Question 7: Who orders the autopsy in the case of a Road Traffic Accident (RTA)?

A. A. Forensic expert
B. B. Police (Correct Answer)
C. C. Lawyer
D. D. Forensic doctor

Explanation: **B. Police** - In cases of Road Traffic Accidents (RTAs) and other **medico-legal deaths**, the **police** are typically responsible for ordering an autopsy. - This is because the death is suspicious and may involve criminal investigation, requiring formal authorization from law enforcement to establish the cause and manner of death. *A. Forensic expert* - A **forensic expert** performs the autopsy but does not have the authority to order it. - Their role is to conduct the examination and provide expert findings to the investigating authorities. *C. Lawyer* - A **lawyer** may be involved in the legal proceedings related to the RTA but does not have the authority to order an autopsy. - Their role is to represent clients and use the autopsy findings as evidence in court. *D. Forensic doctor* - A **forensic doctor** (or forensic pathologist) is the medical professional who conducts the autopsy. - They do not initiate the autopsy themselves but perform it upon the request of authorized parties, such as the police or a medical examiner/coroner.

Question 8: Mees' lines and raindrop pigmentation on the hands are seen in which type of poisoning?

A. Arsenic (Correct Answer)
B. Thallium
C. Cadmium
D. Lead

Explanation: **Arsenic** - **Mees' lines** (transverse white bands on fingernails) and **raindrop pigmentation** (hyperpigmentation with scattered hypopigmented spots) are classic dermatological manifestations of chronic arsenic poisoning. - Arsenic interferes with cellular respiration and DNA repair, leading to systemic effects including characteristic skin changes. *Thallium* - Thallium poisoning is often associated with diffuse **hair loss (alopecia)**, sensory neuropathy, and gastrointestinal symptoms. - It does not typically cause Mees' lines or raindrop pigmentation. *Cadmium* - Chronic cadmium exposure is primarily associated with **renal dysfunction** (Fanconi syndrome), **osteomalacia**, and lung disease. - It does not cause the specific nail or skin pigmentation described. *Lead* - Lead poisoning typically manifests with **gastrointestinal symptoms** (colic), neurological deficits (foot drop), and **anemia**. - While it can cause some dermatological changes, **Mees' lines** and **raindrop pigmentation** are not characteristic features.

Question 9: A man presented with bilateral non-inflammatory edema after consuming a particular oil. Which test should be performed by the drug inspector to check for the adulterant?

A. Paper chromatography test
B. Nitric acid test (Correct Answer)
C. Methylene Blue Reduction Test
D. Baudouin test

Explanation: ***Nitric acid test*** - The **nitric acid test** is used to detect the presence of **argemone oil** in mustard oil, which is a common adulterant. - **Argemone oil** ingestion can cause **epidemic dropsy**, characterized by bilateral non-inflammatory edema. *Paper chromatography test* - **Paper chromatography** is a technique used for separating and identifying components of a mixture based on differences in their partition coefficient between a stationary and a mobile phase. - While it can identify various substances, it is not the primary or most rapid test specifically for **argemone oil adulteration** when epidemic dropsy is suspected. *Methylene Blue Reduction Test* - The **Methylene Blue Reduction Test** (MBRT) is primarily used in **dairy products** to assess the microbiological quality of milk. - It measures the time taken for methylene blue to decolorize, indicating the number of viable microorganisms, and is not relevant for detecting oil adulterants. *Baudouin test* - The **Baudouin test** is used to detect the presence of **sesame oil** in other oils. - While an important test for adulteration, it is not specific for **argemone oil**, which causes the symptoms described.

Question 10: A suspicious stain was treated with glacial acetic acid and heated. Examination shows the following crystalline finding. Which confirmatory test is being depicted?

A. Barberio's test
B. Florence test
C. Teichman test (Correct Answer)
D. Takayama test

Explanation: ***Teichman test*** - The Teichman test involves treating bloodstains with **glacial acetic acid** and **heat** to form **hemin crystals**, which are characteristic rhombic crystals of hematin hydrochloride. - This test is a **confirmatory test** for the presence of blood, distinguished by its specific crystalline structure under magnification. *Barberios test* - The Barberio's test is used to detect **spermine**, a component of seminal fluid, not blood. - It involves the formation of yellow, needle-like crystals of **spermine picrate** when treated with picric acid. *Florence test* - The Florence test is another presumptive test for the presence of **spermine** in seminal fluid. - It produces dark brown, rhomboid crystals of **choline periodide** when Lugol's iodine solution is added. *Takayama test* - The Takayama test is a **confirmatory test for blood** that forms characteristic **hemochromogen crystals**. - This test uses a solution containing pyridine, glucose, and dilute sodium hydroxide, which, when heated, forms **pink feathery crystals**, differentiating it from the Teichman test's rhombic crystals.