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
[{'content': 'A most common cause of delayed puberty in males is – \nSelect and explain. \nA. Kallaman syndrome, B. Klienfelter syndrome, C. Constitutional, D. Prader–willi syndrome', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Most common cause of delayed puberty is constitutional.', 'role': 'assistant'}]