Antidote for arsenic poisoning is:
**Core Concept**
Arsenic poisoning occurs when arsenic, a toxic metalloid, accumulates in the body. The antidote for arsenic poisoning should effectively mobilize and eliminate arsenic from the body.
**Why the Correct Answer is Right**
The correct antidote for arsenic poisoning is dimercaprol (British anti-Lewisite, BAL). Dimercaprol works by forming a stable complex with arsenic, making it water-soluble and allowing for its excretion from the body. This process is crucial in preventing the toxic effects of arsenic on various organs, including the skin, liver, and nervous system.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is missing, so we cannot evaluate it.
* **Option B:** The actual antidote for mercury poisoning, not arsenic poisoning.
* **Option C:** This option is also missing, so we cannot evaluate it.
**Clinical Pearl / High-Yield Fact**
Dimercaprol is a chelating agent that can also be used in the treatment of poisoning by other heavy metals, such as mercury, lead, and gold. However, its use in arsenic poisoning is the most well-established and widely accepted.
**Correct Answer:** D. Dimercaprol