This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Opioids and Alcohols, Subject name: Pharmacology
[{'content': 'Which of the following drugs reduces alcohol craving and chances of resumed heavy drinking by alcoholics after they have undergone a detoxification programme with this drug? \nSelect and explain. \nA. Chlordiazepoxide, B. Chlorpromazine, C. Methadone, D. Naltrexone', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Drugs decreasing alcohol craving are; None: Naltrexone Of: Ondansetron The: Topiramate Above: Acamprosate', 'role': 'assistant'}]