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: Radiology
[{'content': 'All are radiological features of ricket except: \nSelect and explain. \nA. III defined epiphysis, B. Narrow growth plate, C. Frayed and widened metaphysis, D. Metaphyseal cupping', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Narrow growth plate', 'role': 'assistant'}]