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': 'Treatment of choice for OCD : \nSelect and explain. \nA. Behavior therapy, B. Drug therapy, C. Psychosurgery, D. Combination of behavior and drug therapy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D. i.e. Combination of behaviour & drug therapy', 'role': 'assistant'}]