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': 'Delayed dentition is seen in all/except – \nSelect and explain. \nA. Down syndrome, B. Congenital hypothyroidism, C. Rickets, D. All of above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]