This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Treatment of tobacco addiction - a) Nicotine  b) Bupropion  c) Mecanylate  d) Dopamine  e) Adenine \nSelect and explain. \nA. ab, B. bc, C. ac, D. ad', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]