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: Psychiatry
[{'content': 'Drugs used in maintenance of substance dependance: \nSelect and explain. \nA. Clonidine, B. Acamprosate, C. Disulfiram, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A i.e. Clonidine; B i.e. Acamprosate; C i.e. Disulfiram', 'role': 'assistant'}]