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
True about dentition - 
Select and explain. 
A. Hypothyroidism causes delayed dentition, B. Premolar is not seen in primary dentition, C. 3rd molar is the last to appear in secondary dentition, D. All
D: All
Answer: D: All 
Explanation: Ans. is 'a' i.e., Hypothyroidism causes delayed dentition; 'b' i.e., Premolar is not seen in primary dentition; 'c' i.e., 3rd molar is the last to appear in secondary dentition