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': 'Which of the following is not a sign of active rickets ? \nSelect and explain. \nA. Prominent fontanelle, B. Hot cross bun sign, C. Saddle nose, D. Caries teeth', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Saddle nose is not seen in rickets.', 'role': 'assistant'}]