**Core Concept**
The underlying principle being tested is the management of **paracetamol (acetaminophen) overdose**, which involves understanding the role of antidotes in preventing **hepatic toxicity**. **N-acetylcysteine** is a key player in this context.

**Why the Correct Answer is Right**
The correct answer is based on the fact that **N-acetylcysteine** replenishes **glutathione** stores in the liver, which counteracts the toxic effects of **N-acetyl-p-benzoquinone imine (NAPQI)**, a metabolite of paracetamol. This mechanism prevents liver damage.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specified.
**Option B:** Incorrect because it is not specified.
**Option C:** Incorrect because it is not specified.
**Option D:** Incorrect because it is not specified, but typically, options other than N-acetylcysteine are incorrect for paracetamol poisoning.

**Clinical Pearl / High-Yield Fact**
Remember, **N-acetylcysteine** should be administered promptly in cases of paracetamol overdose to prevent liver injury.

**Correct Answer:** D. N-acetylcysteine.