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: Dental
Least successful approach of behaviour management is: 
Select and explain. 
A. Coping, B. Comparison, C. Tell Show and Do, D. None
B: Comparison
Answer: B: Comparison 
Explanation: Least successful approach of behaviour management is comparing the child with others.