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: Pediatrics
Which of the following is not true regarding "thumb sucking" 
Select and explain. 
A. Feels insecurity, B. Pleasurable sensation, C. Leads to dental problems, D. None
D: None
Answer: D: None 
Explanation: Ans. is None