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': 'Fraying at the ends of long bones is seen in: \nSelect and explain. \nA. Rickets, B. Scurvy, C. Osteogenesis imperfecta, D. Congenital syphilis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Rickets', 'role': 'assistant'}]