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': 'Drug of choice for prophylaxis of Mania is \nSelect and explain. \nA. Diazepam, B. Lithium, C. Haloperidol, D. Fluoxetin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Lithium Condition Drug of choice Acute mania Prophylaxis of bipolar disorder Lithium (Li)Q LiQ Rapid cyclers ValproateQ or Li & L-T3 > Carbamazepine', 'role': 'assistant'}]