This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
[{'content': 'Which among the following medications has been found to be effective in smoking cessation? \nSelect and explain. \nA. Bupropion, B. Buspirone, C. Paroxetine, D. Venlafaxine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bupropion has been shown to reduce the urge in people who need to quit smoking. Also used for depression Ref: KD Tripathi 8th ed.', 'role': 'assistant'}]