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': 'Delirium tremens is characteristically seen in \nSelect and explain. \nA. Chronic alcoholism, B. B2 deficiency, C. B12 deficiency, D. Niacin deficiency', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Chronic alcoholism', 'role': 'assistant'}]