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
Most common cause of delayed pubey in males is ? 
Select and explain. 
A. Kallaman syndrome, B. Klienfelter syndrome, C. Constitutional, D. Prader-willi syndrome
C: Constitutional
Answer: C: Constitutional 
Explanation: Ans. is 'c' i.e., Constitutional o Most common cause of delayed pubey is constitutional.