**Core Concept**
The question tests the understanding of the mechanism of action of different antibiotics, specifically their interaction with **penicillin-binding proteins (PBPs)**. PBPs are essential for bacterial cell wall synthesis. Different antibiotics have affinity for different PBPs.

**Why the Correct Answer is Right**
The correct answer is related to the specific **antibiotic** that targets **PBP-2**, which is often associated with resistance mechanisms in certain bacteria. **Methicillin** and other **beta-lactam antibiotics** work by binding to these proteins, inhibiting cell wall synthesis.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not specifically target PBP-2.
**Option B:** Incorrect as it has a different mechanism of action.
**Option C:** Incorrect because it targets a different PBP.

**Clinical Pearl / High-Yield Fact**
Remember, **methicillin** is used to treat **methicillin-resistant Staphylococcus aureus (MRSA)** is incorrect, as MRSA is resistant to methicillin.

**Correct Answer:** D. Methicillin.