This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Child Psychiatry, Subject name: Psychiatry
[{'content': 'Tics, hair pulling nail biting can be treated by: \nSelect and explain. \nA. Mind fullness, B. Social habit treating, C. Habit reversal training, D. No intervention required', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In habit reversal, patient learns to identify the urge that happens before ticks. And when he senses the urge, he follows it with a voluntary behavior (such as slow rhythmic breathing) instead of the tic.', 'role': 'assistant'}]