## Core Concept
The question tests knowledge of pharmacological agents used to aid in smoking cessation. Smoking cessation medications typically work by either reducing cravings for nicotine or blocking its effects in the brain.

## Why the Correct Answer is Right
The correct answer, **Bupropion**, is an antidepressant medication that has been approved by the FDA to help people quit smoking. It works by affecting neurotransmitters in the brain, specifically **dopamine** and **norepinephrine**, which are involved in regulating mood and craving. By altering the levels of these neurotransmitters, bupropion reduces smoking cravings and withdrawal symptoms.

## Why Each Wrong Option is Incorrect
* **Option A:** This option is blank and does not provide a valid medication.
* **Option C:** This option is also blank and does not provide a valid medication.
* **Option D:** This option is blank as well and does not provide a valid medication.

## Clinical Pearl / High-Yield Fact
A key point to remember is that **bupropion** is one of the few non-nicotine prescription medications approved to help people quit smoking. Another important medication in this category is **varenicline**, which works by blocking the nicotine receptors in the brain. A classic clinical pearl is that **bupropion** can also be used for the treatment of depression, making it a versatile drug.

**Correct Answer: B. Bupropion**