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': 'Behaviour therapy is useful in: \nSelect and explain. \nA. Panic attack, B. OCD, C. Personality disorder, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A. i.e. Panic attack B. i.e. OCD; C. i.e. Personality disorder', 'role': 'assistant'}]