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 obscessive compulsive disorder is: \nSelect and explain. \nA. Fluoxetine, B. Clomipramine, C. Clonazepam, D. Carbamazepine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Fluoxetine', 'role': 'assistant'}]