This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal System, Subject name: Radiology
[{'content': '"Corner sign of park" is feature of: \nSelect and explain. \nA. Scurvy, B. Rickets, C. Battered baby syndrome, D. Sickle cell disease', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. A. ScurvyScurvy-Radiographic findings:1. Osteoporosis2. Pencil thin cortex3. Wimberger's sign4. Trummerfeld zone of rarefaction5. Corner sign of Park6. Line of Frankel7. Subperiosteal hemorrhage", 'role': 'assistant'}]