This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Pubey, Subject name: Pediatrics
[{'content': 'Most common cause of delayed pubey in males is: \nSelect and explain. \nA. Kallman syndrome, B. Klinefelter syndrome, C. Constitutional, D. Prader-willi syndrome', 'role': 'user'}, {'content': 'Answer: C \nExplanation: DELAYED PUBEY: More common in boys Delayed pubey in boys - lack of pubeal changes by 14 yrs of age Most common cause of delayed pubey is constitutional. Constitutional delay in pubey in boys: Have growth retardation & delayed bone age Family history of delayed pubey is present Gonadotropin levels - prepubeal - similar to hypogonadotropic hypogonadism', 'role': 'assistant'}]