**Core Concept**
Zyban is a medication used as an adjunct in smoking cessation. It works by inhibiting the reuptake of norepinephrine and dopamine, thereby increasing their availability in the synaptic cleft. This action is primarily achieved through the blockade of the norepinephrine transporter.

**Why the Correct Answer is Right**
The correct answer is a medication that belongs to the class of norepinephrine-dopamine reuptake inhibitors (NDRI). This class of medications acts by inhibiting the reuptake of norepinephrine and dopamine, leading to an increase in their synaptic concentrations. Zyban, also known as bupropion, is a well-known NDRI used in the management of depression and smoking cessation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not a known medication for smoking cessation or an NDRI.
**Option B:** This option is incorrect because it is not the primary medication used for smoking cessation or an NDRI.
**Option C:** This option is incorrect because it is not a known medication for smoking cessation or an NDRI.

**Clinical Pearl / High-Yield Fact**
Zyban is also used off-label for the treatment of attention deficit hyperactivity disorder (ADHD) due to its ability to increase dopamine and norepinephrine levels in the brain.

**Correct Answer: C. Bupropion**