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
Which of the following is known as corner stone of behavior management: 
Select and explain. 
A. Modelling., B. Tell Show Do., C. Contigency management., D. Communication.
B: Tell Show Do.
Answer: B: Tell Show Do. 
Explanation: None