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': 'Anticraving agent which acts as NMDA antagonist is \nSelect and explain. \nA. Naltrexone, B. Acamprosate, C. Baclofen, D. Topiramate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Anticraving drugs used to treat alcohol abuse\n\nAcamprosate: NMDA blocker\nNaltrexone: Opioid antagonist.', 'role': 'assistant'}]