Following is a contact poison –
**Core Concept**
Contact poisons are chemical substances that can cause harm or death upon skin contact. These substances can cause skin irritation, burns, and even systemic toxicity if ingested or inhaled.
**Why the Correct Answer is Right**
The correct answer is a potent neurotoxin that can cause severe skin irritation, blistering, and even death upon contact. It works by disrupting the cell membrane and causing necrosis of the skin. The mechanism of action involves the formation of free radicals that damage cellular structures.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not a contact poison. It is a type of medication used to treat certain medical conditions.
**Option B:** This option is incorrect because it is a type of allergen that causes skin irritation, but it is not a contact poison.
**Option C:** This option is incorrect because it is a type of poison that is ingested, not a contact poison.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that contact poisons can cause severe skin burns and necrosis, and prompt medical attention is necessary to prevent long-term damage.
**Correct Answer:** C. Strychnine