NEET-PG 2013 Practice Questions

Q: Buon's line is seen in: Al 07; Rajasthan 11; NEET 13; JIPMER 13

Lead poisoning. ***Lead poisoning*** - **Buon's line**, also known as a **gingival lead line** or **Burton's line**, is a blue-black line visible on the gums at the junction of the teeth, characteristic of chronic lead poisoning. - This line is formed by the reaction of circulating lead with sulfur ions released by bacterial action in the mouth, forming **lead sulfide** deposits. *Phosphorus poisoning* - **Phosphorus poisoning** can cause widespread organ damage, including gastrointestinal symptoms, liver and kidney failure, and cardiovascular collapse. - It does not typically present with a characteristic gingival line like Buon's line. *Zinc poisoning* - **Zinc poisoning** is relatively rare and can lead to symptoms like nausea, vomiting, abdominal pain, and copper deficiency. - It is not associated with the formation of Buon's line in the gums. *Arsenic poisoning* - **Arsenic poisoning**, particularly chronic exposure, can manifest with skin lesions, neuropathies, and gastrointestinal issues. - A characteristic skin manifestation is **Mee's lines** (transverse white bands on the fingernails), but not Buon's line.

Q: Green colored urine is seen after ingestion of:

Phenol. ***Phenol*** - Ingestion of **phenol** can lead to green-colored urine due to the formation of oxidation products, such as **hydroquinone** and **catechol**, which are excreted in the urine. - The green discoloration is a distinct toxicological sign associated with systemic phenol absorption. *Organophosphorus* - **Organophosphorus** poisoning primarily causes cholinergic symptoms like miosis, bradycardia, bronchorrhea, and muscle fasciculations. - It does not typically lead to a change in urine color; the urine usually remains clear or amber. *Copper sulphate* - **Copper sulfate** poisoning can cause symptoms like vomiting, abdominal pain, diarrhea, and potentially kidney damage. - While it can cause renal dysfunction, it does not typically result in green urine discoloration. *Cyanide* - **Cyanide** poisoning is characterized by rapid onset of symptoms affecting the cardiovascular, respiratory, and central nervous systems, leading to cellular hypoxia. - Urine color is not a characteristic feature of cyanide poisoning; it usually remains normal or slightly discolored due to other complications like rhabdomyolysis in severe cases.

Q: Yellow discoloration of skin and mucosa is seen in poisoning with:

Nitric acid. ***Nitric acid*** - **Nitric acid** causes a characteristic **yellow discoloration** of the skin and mucous membranes due to the formation of **xanthoproteic acid**. - This reaction occurs when nitric acid comes into contact with proteins, nitrating the aromatic amino acids (tyrosine, tryptophan, and phenylalanine). *Phosphoric acid* - **Phosphoric acid** burns, if severe, can cause skin irritation with redness and blistering, but typically do not result in a distinct yellow discoloration. - While corrosive, its mechanism of tissue damage differs from nitric acid's specific reaction with proteins. *Sulphuric acid* - **Sulphuric acid** is a potent dehydrating agent and corrosive acid that causes severe burns, often appearing **black or brown (eschar)** due to tissue coagulation and carbonization. - It does not produce the specific yellow discoloration seen with nitric acid. *Nitrous oxide* - **Nitrous oxide** is an inhalational anesthetic and analgesic, and its overdose can lead to **hypoxia**, dizziness, and potential bone marrow suppression with chronic abuse. - It does not cause any form of skin or mucosal discoloration; its effects are systemic and neurological.

Q: According to JJ Act 2000, a juvenile is a boy and girl respectively less than:

18 and 18. ***18 and 18*** - As per the **Juvenile Justice (Care and Protection of Children) Act, 2000**, a juvenile (or child) is defined uniformly as an individual who has not completed 18 years of age, regardless of gender. - This definition ensures that both boys and girls under 18 years old receive the same protections and care under the juvenile justice system. *16 and 18* - This option reflects an outdated or incorrect understanding of the **Juvenile Justice Act, 2000**, which specifically establishes a single age limit for both genders. - Prior to the 2000 Act and its subsequent amendments, some laws might have had different age limits for boys and girls, but the JJ Act 2000 unified this to 18 for both. *14 and 16* - This option refers to age limits that are significantly lower than those established by the **Juvenile Justice Act, 2000**, which aims to protect individuals up to the age of 18. - These ages do not correspond to the legal definition of a juvenile under the specified Act. *18 and 21* - While 18 is the correct upper age limit for both boys and girls under the **Juvenile Justice Act, 2000**, the age of 21 is typically associated with the legal age of adulthood for certain rights and responsibilities, not for defining a juvenile under this act. - The JJ Act focuses on protecting children up to 18, not distinguishing adulthood beyond that for juvenile purposes.

Q: Lathi can cause all of the following injuries, except:

Abrasion collar. ***Abrasion collar*** - An **abrasion collar** is a specific injury pattern seen exclusively in **gunshot wounds**, caused by the friction and heat of the bullet as it enters the skin - This creates a rim of abraded skin around the entry wound, which is pathognomonic for firearm injuries - A **lathi** (stick or baton) is a blunt force object and **cannot produce** this type of wound pattern *Contusion* - A **contusion** (bruise) is a classic injury from blunt force trauma - A lathi strike commonly causes contusions by rupturing small blood vessels beneath intact skin - This results in hemorrhage into soft tissues without breaking the skin surface *Incised looking lacerated wound* - While a **lathi** is a blunt object, when struck with significant force or at a tangential angle, it can cause **lacerations** that may appear incised - The tearing of skin over bony prominences can create wounds with relatively clean, straight edges - These "incised-looking" lacerations result from skin being crushed and split, mimicking cut wounds *Fissured fracture* - A **lathi** struck with sufficient force can cause **fissured fractures** - linear cracks in bone without significant displacement - This type of fracture commonly occurs in skull bones when struck by cylindrical blunt objects - The impact delivers concentrated force along a line, creating characteristic linear fracture patterns

Q: Organs first to be injured in air blast:

Ear, lung. ***Ear, lung*** - The **ear** and **lungs** are the first organs injured in an air blast due to their high air-tissue interfaces, making them extremely vulnerable to sudden pressure changes. - The **tympanic membrane** in the ear is very sensitive to barotrauma, and the **alveoli** in the lungs can rupture easily. *Pancreas, duodenum* - These organs are located deep within the abdomen and are primarily protected by other structures, making them less susceptible to direct **blast overpressure** injury. - Injuries to these organs are more typical of **secondary or tertiary blast injuries**, such as blunt trauma from impact or penetrating trauma from fragments. *Liver, muscle* - The **liver** is a solid organ that is relatively resistant to direct blast overpressure, though it can be damaged by crushing forces. - **Muscle tissue** is also dense and less vulnerable to direct air blast effects compared to air-filled organs. *Kidney, spleen* - Similar to the liver, the **kidneys** and **spleen** are solid, dense organs that are less susceptible to direct **primary blast injury**. - Injuries to these organs typically occur from **secondary or tertiary blast mechanisms**, like penetrating trauma or blunt force.

Q: Knockout drops are:

Chloral hydrate. ***Chloral hydrate*** - **Chloral hydrate** is a sedative-hypnotic substance historically used as "knockout drops" due to its quick action in inducing sleep or unconsciousness. - Its use has largely been replaced by safer alternatives due to its narrow therapeutic index and potential for respiratory depression and cardiac arrhythmias. *Kerosene* - **Kerosene** is a flammable hydrocarbon liquid primarily used as fuel or solvent, not as a sedative or hypnotic agent. - Ingestion of kerosene is highly toxic and can cause chemical pneumonitis and gastrointestinal irritation. *Paraldehyde* - **Paraldehyde** is an older sedative and hypnotic drug, but it is not typically referred to as "knockout drops." - It has a very pungent odor and taste, which would make surreptitious administration difficult, and is generally avoided in modern medical practice. *Turpentine* - **Turpentine** is a distillate of pine resin used as a solvent or cleaner, and historically as a liniment or anthelminthic. - It is highly toxic if ingested and can cause severe gastrointestinal distress, kidney damage, and central nervous system depression, but it is not a sedative-hypnotic.

Q: Barium carbonate poisoning causes -

Muscular weakness. ***Correct: Muscular weakness*** - **Soluble barium salts** (barium chloride, barium nitrate, barium sulfide) are highly toxic when ingested, releasing Ba²⁺ ions - Barium blocks **potassium channels** in cell membranes, causing **intracellular shift of potassium** leading to profound **hypokalemia** - This results in **flaccid paralysis** and severe **muscular weakness**, which is the **hallmark feature** of barium poisoning - Can progress to **paralysis of respiratory muscles**, making it life-threatening - **Note:** Barium carbonate itself is **insoluble** and relatively non-toxic; toxicity occurs when converted to soluble forms in stomach acid *Incorrect: Gastrointestinal irritation* - While mild GI symptoms (nausea, vomiting, diarrhea) may occur, they are **not the dominant feature** - The primary toxicity is **neuromuscular** rather than gastrointestinal - GI irritation, when present, is overshadowed by the dramatic muscular manifestations *Incorrect: Cyanosis* - Cyanosis is not a primary feature of barium poisoning - May occur **secondarily** if respiratory muscle paralysis is severe enough to cause hypoxemia - Not a characteristic or early sign *Incorrect: Respiratory distress* - Respiratory distress occurs due to **paralysis of respiratory muscles** from hypokalemia - This is a **complication** of the muscular weakness, not the primary manifestation - While serious and potentially fatal, it represents progression of the neuromuscular toxicity

Q: In sexual assault of a child, the hymen is usually not ruptured due to:

Deep seated. ***Deep seated*** - In prepubertal children, the hymen is **deep-seated within the vaginal orifice**, positioned well inside the vaginal opening - This anatomical location provides **natural protection** from external trauma - The deep position means that superficial contact may not reach the hymenal tissue - This is the **classical forensic medicine teaching** regarding preservation of hymen in child sexual assault cases *Incorrect: Distensible* - While the child's hymen is indeed elastic and distensible (which also contributes to non-rupture), this is not the primary reason cited in forensic literature - Distensibility is a secondary protective factor *Incorrect: Too tough to rupture* - The prepubertal hymen is **not particularly tough or thick** - In fact, it is relatively thin and delicate compared to post-pubertal hymen - Toughness is not the protective mechanism *Incorrect: Underdeveloped* - The hymen is present and developed in children, just positioned differently - "Underdeveloped" does not explain the protection from rupture - The issue is **anatomical position**, not developmental status

Q: The term 'frigidity' (though outdated) traditionally refers to:

Inability to initiate sexual arousal in female. ***Inability to initiate sexual arousal in female*** - The term "frigidity," though now considered **outdated and pejorative**, traditionally referred to a woman's inability to experience **sexual arousal** or pleasure. - This term encompassed various forms of female sexual dysfunction, including **anorgasmia** and **hypoactive sexual desire disorder**, which are now described with greater precision. *Inability to conceive with a particular male* - This describes **infertility** or **subfertility**, which is a distinct medical condition related to reproductive capacity, not sexual pleasure or arousal. - While sexual activity is necessary for conception, the inability to conceive does not inherently mean a lack of sexual arousal or desire. *Ejaculation occurring immediately after penetration* - This describes **premature ejaculation**, a male sexual dysfunction characterized by rapid orgasm and ejaculation, typically before, during, or shortly after penetration. - This term is relevant to male sexual function and not to female sexual arousal. *Inability to initiate sexual arousal in male* - This condition is known as **erectile dysfunction** (ED) or **male hypoactive sexual desire disorder**, referring to a man's inability to achieve or maintain an erection or lack of sexual desire. - The term "frigidity" was specifically and historically applied to female sexual difficulties, not male ones.

Question 1

Buon's line is seen in: Al 07; Rajasthan 11; NEET 13; JIPMER 13

Accepted Answer

Lead poisoning

Answer

Phosphorus poisoning

Answer

Zinc poisoning

Answer

Arsenic poisoning

Question 2

Green colored urine is seen after ingestion of:

Accepted Answer

Phenol

Answer

Organophosphorus

Answer

Copper sulphate

Answer

Cyanide

Question 3

Yellow discoloration of skin and mucosa is seen in poisoning with:

Accepted Answer

Nitric acid

Answer

Phosphoric acid

Answer

Sulphuric acid

Answer

Nitrous oxide

Question 4

According to JJ Act 2000, a juvenile is a boy and girl respectively less than:

Accepted Answer

18 and 18

Answer

16 and 18

Answer

14 and 16

Answer

18 and 21

Question 5

Lathi can cause all of the following injuries, except:

Accepted Answer

Abrasion collar

Answer

Contusion

Answer

Incised looking lacerated wound

Answer

Fissured fracture

Question 6

Organs first to be injured in air blast:

Accepted Answer

Ear, lung

Answer

Pancreas, duodenum

Answer

Liver, muscle

Answer

Kidney, spleen

Question 7

Knockout drops are:

Accepted Answer

Chloral hydrate

Answer

Kerosene

Answer

Paraldehyde

Answer

Turpentine

Question 8

Barium carbonate poisoning causes -

Accepted Answer

Muscular weakness

Answer

Gastrointestinal irritation

Answer

Cyanosis

Answer

Respiratory distress

Question 9

In sexual assault of a child, the hymen is usually not ruptured due to:

Accepted Answer

Deep seated

Answer

Distensible

Answer

Too tough to rupture

Answer

Underdeveloped

Question 10

The term 'frigidity' (though outdated) traditionally refers to:

Accepted Answer

Inability to initiate sexual arousal in female

Answer

Inability to conceive with a particular male

Answer

Ejaculation occurring immediately after penetration

Answer

Inability to initiate sexual arousal in male

NEET-PG 2013

Dental

Forensic Medicine

Psychiatry