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': 'In obsessive - compulsive disorder, which is not given: \nSelect and explain. \nA. Cloimipramine, B. Haloperidol, C. Sealine, D. Cabamazepine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B. i.e. Haloperido', 'role': 'assistant'}]