A plant , native of south america is a source of a drug of addiction which is CNS stimulant. This drug inhabits transport of :-

Options

A. Acetylcholine
B. Dopamine
C. Serotonin
D. Adrenaline

Answer

### Step-by-Step Solution:

1. **Identify the Plant and Drug**: The question refers to a plant native to South America that is a source of a drug of addiction, specifically a CNS (Central Nervous System) stimulant. The plant in question is the coca plant, which is used to produce cocaine.

2. **Understand CNS Stimulants**: CNS stimulants are substances that increase brain activity, leading to heightened alertness, energy, and various physiological responses such as increased heart rate and blood pressure.

3. **Determine the Mechanism of Action**: Cocaine, derived from the coca plant, primarily affects the neurotransmitter systems in the brain. It does this by inhibiting the reuptake of certain neurotransmitters, leading to increased levels of these chemicals in the synaptic cleft.

4. **Identify the Neurotransmitter**: Among the options given (Acetylcholine, Dopamine, Serotonin, Adrenaline), cocaine specifically inhibits the transport of dopamine. Dopamine is a neurotransmitter that plays a significant role in the brain's reward and pleasure centers.

5. **Conclusion**: Therefore, the drug (cocaine) inhibits the transport of dopamine, which is associated with feelings of pleasure and reward.

### Final Answer:
Cocaine inhibits the transport of **Dopamine**.

---