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
Tics, hair pulling, nail biting can be treated by? 
Select and explain. 
A. Mind fullness, B. Social habit training, C. Habit and response prevention, D. No intervention required
D: No intervention required
Answer: D: No intervention required 
Explanation: No intervention required REF: OP Ghai 7th ed p. 37 Habit disorders: Head banging, rocking of body, teeth grinding, thumb sucking, hair pulling are repititive disorders seen in children in age group of 6 months to 2 years. They are benign and self limited. These movements seem to serve as means of tension discharging in children. As children become older, they learn to inhibit some of their rythmic patterns. Undue attention by parents can lead to aggravation of these problems.