Which of the following is a drug containing two sulfhydryl groups in a molecule?
**Core Concept**
The question is testing the student's knowledge of the chemical structure of drugs, specifically those containing sulfhydryl groups. Sulfhydryl groups are a type of functional group that contains a sulfur atom bonded to two hydrogen atoms, and are often found in drugs that have antioxidant properties.
**Why the Correct Answer is Right**
Penicillamine is a drug that contains two sulfhydryl groups in its molecule. It is used in the treatment of Wilson's disease, a genetic disorder that causes copper to accumulate in the body. The sulfhydryl groups in penicillamine allow it to bind to copper ions, facilitating their excretion from the body. The drug's mechanism of action is closely related to its chemical structure, which is why the presence of two sulfhydryl groups is crucial for its therapeutic effect.
**Why Each Wrong Option is Incorrect**
* **Option A:** Not specified, so we can't evaluate it.
* **Option B:** Not a drug known to contain sulfhydryl groups.
* **Option D:** Not a drug known to contain sulfhydryl groups.
**Clinical Pearl / High-Yield Fact**
Penicillamine is a chelating agent that can also be used to treat heavy metal poisoning, such as lead or mercury intoxication. Its ability to bind to metal ions makes it a useful therapeutic agent in these cases.
**Correct Answer:** C. Penicillamine.