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': "Other than osteosarcoma, sun-ray appearance is also seen in: \nSelect and explain. \nA. Ewing's sarcoma, B. Fibrous dysplasia, C. Chondrosarcoma, D. All of the above", 'role': 'user'}, {'content': "Answer: A \nExplanation: Osteosarcoma produces sun-ray or sunburst appearance with spicules of new bone radiating outward on the periphery in the sclerosing form of osteosarcoma. Sun-ray appearance is also seen in Ewing's sarcoma.", 'role': 'assistant'}]