This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pediatrics
[{'content': 'Most common cause of delayed pubey in males is \nSelect and explain. \nA. Kallaman syndrome, B. Klienfelter syndrome, C. Constitutional, D. Prader-willi syndrome', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Constitutional delay in growth and pubey is the most common cause of delayed pubey in boys.These boys have growth retardation and delayed bone age.Family history of delayed pubey is present.Gonadotropin levels are prepubeal similar to hypgonadotropic hypogonadism. Reference : OP Ghai ,eseential paediatrics 8 th edition, page no 538 .', 'role': 'assistant'}]