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: Pharmacology
[{'content': 'Which of the following is used to maintain abstinence in alcohol dependence ? \nSelect and explain. \nA. Naltrexone, B. Clonidine, C. Disulfiram, D. Naloxone', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Naltrexone o Naltrexone is the preferred agent for maintaince of abstinence in alcohol dependence.", 'role': 'assistant'}]