Algor mortis is defined as:
Cause of death in cafe coronary:
Victim was strangled with elbow around neck. It is called as:
What is the most reliable method to determine the time of death within the first 24 hours after death?
Cognizable offence comes under which section of CrPC? (NEET 13)
Police inquest is most straightforward in:
Datura poisoning is characterized by:
An incised-looking laceration is seen in all except:
Causing miscarriage is punishable under which IPC:
DNA fingerprinting can be done with all, except:
NEET-PG 2013 - Forensic Medicine NEET-PG Practice Questions and MCQs
Question 61: Algor mortis is defined as:
- A. Hypostasis
- B. Cadaveric spasm
- C. Rigor mortis
- D. Cooling of body (Correct Answer)
Explanation: ***Cooling of body (Algor mortis)*** - **Algor mortis** specifically refers to the **post-mortem cooling** of the body until it matches the temperature of the surrounding environment. - This process is used in forensic pathology to estimate the **time of death**, as the rate of cooling is somewhat predictable under standard conditions. - The body typically cools at approximately **1-1.5°F per hour** in temperate conditions, though this varies with environmental factors. *Hypostasis* - **Hypostasis**, also known as **livor mortis** or lividity, is the **pooling of blood** in the capillaries of the skin due to gravity after circulation ceases. - This results in a discoloration of the skin, typically purplish-red, in dependent areas of the body. - It begins within 30 minutes to 2 hours after death and becomes fixed after 8-12 hours. *Cadaveric spasm* - **Cadaveric spasm** is a rare and immediate stiffening of muscles that occurs at the moment of death, without passing through the stage of primary flaccidity. - It is often associated with intense emotional stress or extreme physical exertion just before death, causing objects to be clutched firmly. - This is distinct from rigor mortis as it occurs instantaneously rather than developing gradually. *Rigor mortis* - **Rigor mortis** is the **stiffening of muscles** after death, caused by the depletion of ATP, which prevents the detachment of myosin heads from actin filaments in muscle fibers. - It typically begins 2-4 hours post-mortem, reaches maximum stiffness at 12-24 hours, and then gradually resolves after 24-48 hours as autolysis progresses.
Question 62: Cause of death in cafe coronary:
- A. Pulmonary edema
- B. Laryngeal edema
- C. Asphyxia (Correct Answer)
- D. Cardiac arrest
Explanation: ***Asphyxia*** - Cafe coronary refers to sudden death due to **choking on food or foreign objects**, typically occurring in public places like restaurants. - The primary cause of death is **asphyxia**, resulting from the obstruction of the **larynx or trachea**, preventing air from reaching the lungs. *Pulmonary edema* - **Pulmonary edema** is an accumulation of fluid in the lungs, often due to heart failure or acute lung injury. - It is not the direct cause of death in a cafe coronary, as the primary issue is mechanical airway obstruction, not fluid overload in the lungs. *Laryngeal edema* - **Laryngeal edema** involves swelling of the larynx, which can cause airway obstruction. - While it can lead to respiratory distress, in a cafe coronary, the obstruction is typically mechanical from a foreign body, not primarily an inflammatory or allergic edema of the larynx itself. *Cardiac arrest* - While **cardiac arrest** is the ultimate event leading to death, it is a consequence of severe hypoxia caused by the airway obstruction in a cafe coronary. - The direct and initial cause of the life-threatening situation is the inability to breathe due to the blockage, leading to oxygen deprivation of the heart.
Question 63: Victim was strangled with elbow around neck. It is called as:
- A. Mugging (Correct Answer)
- B. Throttling
- C. Burking
- D. Garrotting
Explanation: ***Mugging*** - **Mugging** (also called "yoking" or "bar arm strangle") is the forensic medicine term for strangulation using the **arm or elbow encircling the neck**. - In this technique, the assailant typically approaches from behind and applies the forearm or crook of the elbow across the victim's throat, compressing the neck structures. - This method compresses the carotid arteries and jugular veins, leading to rapid unconsciousness and potential death from cerebral hypoxia. *Throttling* - **Throttling** specifically refers to manual strangulation using the **hands (fingers and thumbs)** to compress the neck. - The assailant applies direct pressure with their fingers on the front or sides of the victim's neck. - This differs from the scenario described, which involves the elbow/arm, not the hands. *Burking* - **Burking** is a historical method of murder involving suffocation by covering the mouth and nose while applying pressure to the chest. - Named after William Burke, this method was designed to leave minimal external marks on the body. - It does not involve neck compression or strangulation. *Garrotting* - **Garrotting** is strangulation using a **ligature** (rope, wire, cloth, or cord) tightened around the neck. - This involves an instrument rather than direct body contact. - It differs from mugging, which uses the arm/elbow without any intermediate object.
Question 64: What is the most reliable method to determine the time of death within the first 24 hours after death?
- A. Livor mortis is fixed and cannot be displaced after 8-12 hours
- B. Rigor mortis appears first in smaller muscles and progresses to larger muscles
- C. Putrefaction begins immediately after death in all environmental conditions
- D. Algor mortis using rectal temperature with standard nomograms (Correct Answer)
Explanation: ***Algor mortis using rectal temperature with standard nomograms*** - **Algor mortis** (body cooling) measured via **rectal temperature** using standardized nomograms (such as **Henssge's nomogram**) is considered the **most reliable method** for estimating time of death within the first 24 hours. - While environmental factors affect cooling rate, the use of **mathematical models and nomograms** that account for body weight, ambient temperature, and clothing make this method more **objective and reproducible** than other postmortem changes. - Provides **quantitative data** that can be standardized, unlike the more subjective assessments of rigor or livor mortis. *Rigor mortis appears first in smaller muscles and progresses to larger muscles* - **Rigor mortis** follows **Nysten's rule** (progression from smaller to larger muscles), typically appearing within 2-6 hours, peaking at 12-24 hours. - However, the **onset time is highly variable** depending on factors like ante-mortem physical activity, environmental temperature, and cause of death. - The subjective nature of assessment and **significant individual variation** make it less reliable than temperature-based methods for precise time estimation. *Livor mortis is fixed and cannot be displaced after 8-12 hours* - **Livor mortis** (postmortem lividity) becomes fixed and non-blanchable after approximately 8-12 hours. - While useful, the **wide time range** for fixation and the fact that it provides only a few discrete time points (appearance, confluence, fixation) make it less precise than continuous temperature measurements. *Putrefaction begins immediately after death in all environmental conditions* - This statement is **incorrect**. **Putrefaction** (bacterial decomposition) typically begins hours to days after death, heavily dependent on **environmental temperature** and humidity. - Putrefaction is useful for estimating time of death **beyond 24-48 hours**, not within the first 24 hours as asked in this question.
Question 65: Cognizable offence comes under which section of CrPC? (NEET 13)
- A. 1 (a)
- B. 2 (c) (Correct Answer)
- C. 2 (b)
- D. 2 (1)
Explanation: ***Option 2 (c)*** - Section **2(c)** of the Criminal Procedure Code (CrPC) defines a **cognizable offense**. - A cognizable offense is one in which a police officer may **arrest without a warrant** and commence investigation without the permission of a magistrate. *Option 1 (a)* - This section reference is incorrect as there is no relevant definition under **Section 1(a)** that pertains to cognizable offenses. - Section 1 of CrPC deals with the **short title, extent, and commencement** of the code, not definitions. *Option 2 (b)* - Section **2(b)** of the CrPC defines "**charge**." - A charge includes any **head of a charge** when the charge contains more than one head. *Option 2 (1)* - This section reference is not a standard way of citing definitions within the CrPC (should be lowercase alphabet). - Even if interpreted as **Section 2(l)**, it defines **"non-cognizable offense"**, which is the opposite of what the question asks.
Question 66: Police inquest is most straightforward in:
- A. Death by animals
- B. Homicidal death
- C. Suicidal death (Correct Answer)
- D. Dowry death
Explanation: ***Suicidal death*** - Suicidal deaths with clear evidence (suicide note, history of depression, consistent physical findings) are typically the **most straightforward** for police inquest among unnatural deaths. - The investigation primarily focuses on **confirming self-infliction** and ruling out foul play, which is relatively simple when circumstances are clear and consistent. - Unlike homicide, there is **no perpetrator to identify**, and unlike dowry death, there are no complex familial or legal entanglements to investigate. - The inquest becomes straightforward when evidence is consistent: method matches injuries, suicide note is present, and witness statements corroborate suicidal intent. *Death by animals* - Death by animal attacks involves **complex liability investigations** including determining provocation, owner negligence, and whether proper safety measures were in place. - Requires investigation into whether the animal was **improperly restrained**, whether the victim provoked the attack, and potential criminal/civil liability of the owner. - Scene reconstruction and expert veterinary input may be needed, making it more complex than straightforward suicide cases. *Homicidal death* - Homicidal deaths involve **intentional killing by another person**, requiring extensive investigation into motive, suspects, weapon identification, and evidence collection. - These are the **most complex inquests**, involving forensic analysis, witness interviews, crime scene reconstruction, and protracted legal proceedings. *Dowry death* - Dowry deaths under Section 304B IPC are **highly complex**, involving investigation of harassment, dowry demands, and family dynamics over an extended period. - Requires proving that death occurred within **7 years of marriage** and was connected to dowry demands, often involving multiple suspects and sensitive family investigations.
Question 67: Datura poisoning is characterized by:
- A. Pinpoint pupil
- B. Dilated pupil (Correct Answer)
- C. Dilated salivary gland
- D. Decreased temperature
Explanation: ***Dilated pupil*** - **Datura poisoning** is characterized by **anticholinergic symptoms**, including **mydriasis** (dilated pupils) due to the blockade of muscarinic receptors in the iris. - The classic mnemonic "hot as a hare, blind as a bat, dry as a bone, red as a beet, mad as a hatter" highlights the systemic effects, with "blind as a bat" specifically referring to **dilated pupils** and blurred vision. *Pinpoint pupil* - **Pinpoint pupils** (miosis) are typically associated with **opioid toxicity** or **cholinergic poisoning**, which are opposite to the effects of datura. - Datura acts as an **antimuscarinic agent**, preventing acetylcholine from constricting the pupil. *Dilated salivary gland* - **Datura poisoning** causes **dry mouth** due to the inhibition of salivary gland secretions, as it blocks muscarinic receptors responsible for glandular activity. - Therefore, a **dilated salivary gland** (implying increased activity or size) is not a characteristic feature; rather, there is a significant reduction in salivation. *Decreased temperature* - **Datura poisoning** typically leads to **hyperthermia** (increased body temperature) due to the inhibition of sweating, which impairs the body's ability to dissipate heat. - **Decreased temperature** would be an atypical finding and is more commonly seen in conditions like hypothermia or specific intoxications that depress thermoregulation.
Question 68: An incised-looking laceration is seen in all except:
- A. Shin
- B. Chest (Correct Answer)
- C. Zygomatic bone
- D. Iliac crest
Explanation: ***Chest*** - The skin and subcutaneous tissue over the chest are generally **pliable and abundant**, allowing tissues to stretch and tear irregularly rather than creating a clean, incised-looking wound. - Due to the **underlying musculature and lack of prominent bony structures** just beneath the skin, impacts tend to cause contusions, irregular lacerations, or deeper tissue damage rather than sharp, distinct cuts. *Shin* - The shin has minimal subcutaneous tissue and skin that is **tightly bound over the tibia**, a prominent bony structure. - Impacts here often cause the skin to be compressed against the bone, leading to a **clean, sharp tear that mimics an incised wound**. *Zygomatic bone* - The skin over the zygomatic bone (cheekbone) is **thin and adheres closely to the underlying bone**. - Trauma to this area can result in a **linear, incised-appearing laceration** due to the skin being split against the rigid bony surface. *Iliac crest* - Similar to the shin and zygomatic bone, the iliac crest is a **superficial bony prominence with thin skin and limited subcutaneous tissue**. - A blunt force impact can cause the skin to **split cleanly over the bone**, creating an incised-looking laceration.
Question 69: Causing miscarriage is punishable under which IPC:
- A. Sec 312 IPC (Correct Answer)
- B. Sec 320 IPC
- C. Sec 311 IPC
- D. Sec 314 IPC
Explanation: ***Sec 312 IPC*** - This section of the Indian Penal Code specifically deals with **causing miscarriage** and outlines the penalties for such acts. - It differentiates between miscarriage caused with or without the **woman's consent**, and also considers if the act is performed in **good faith** to save the woman's life. *Sec 320 IPC* - This section defines "grievous hurt," which includes severe injuries leading to permanent disability or life-threatening conditions. - While miscarriage can be a severe outcome, **Sec 320** focuses on the nature of the injury to the person rather than the specific act of causing miscarriage. *Sec 311 IPC* - This section pertains to **causing miscarriage of a child quick with child** without the consent of the woman and without good faith to save her life. - It carries a harsher punishment than Sec 312 because it involves a fetus that is considered more developed and near viability. *Sec 314 IPC* - This section deals with the **death caused by an act done with intent to cause miscarriage**. - It applies when a person commits an act to cause miscarriage, and as a result, the woman dies, even if the intent was not to cause her death.
Question 70: DNA fingerprinting can be done with all, except:
- A. Saliva
- B. WBC
- C. RBC (Correct Answer)
- D. Spermatozoa
Explanation: ***RBC*** - **Mature red blood cells** lack a nucleus and therefore do not contain **DNA**. - DNA fingerprinting relies on analyzing an individual's unique DNA sequence, which is not present in RBCs. *Saliva* - Saliva contains **epithelial cells** from the mouth, which have intact nuclei and thus sufficient DNA for analysis [2]. - It is a common and non-invasive source of DNA for forensic and genetic testing [2]. *WBC* - **White blood cells** (leukocytes) are nucleated cells that contain a full complement of DNA [2]. - They are an excellent source of DNA for genetic analysis, including DNA fingerprinting. *Spermatozoa* - **Sperm cells** are haploid and contain a nucleus with DNA, making them suitable for DNA fingerprinting [1]. - They are frequently used in forensic cases, particularly in sexual assault investigations [1].