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: Unknown
[{'content': 'All of the following are anti-craving agents for alcohol withdrawl except – \nSelect and explain. \nA. Fluoxetine, B. Nitrafezole, C. Naltrexone, D. Acamprosate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Nitrafezole. Disulfiram, Metronidazole and Nitrafezole are deterrents.', 'role': 'assistant'}]