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': "Shepherd's crook deformity is a characteristic radiological feature of \nSelect and explain. \nA. Osteosarcoma, B. Chondrosarcoma, C. Fibrous dysplasia, D. Vertebral hemangioma", 'role': 'user'}, {'content': "Answer: C \nExplanation: Shepherd's crook deformity - Fibrous dysplasia\nCoat - hanger appearance - Osteochondroma.", 'role': 'assistant'}]