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: Orthopaedics
[{'content': 'Sunburst appearance found in -a) Osteosarcomab) Ewings sarcomac) Osteoclastomad) Osteoid osteomae) Chondrosarcoma \nSelect and explain. \nA. ac, B. a, C. ad, D. ab', 'role': 'user'}, {'content': "Answer: D \nExplanation: Sun-ray (sunburst) appearance and Codman's triangle : -\n\n\nTypical features of osteosarcoma.\nMay also be seen in Ewing's sarcoma, osteomyelitis.\n\n\nOnion-peel appearance\n\n\nTypical feature of Ewing's sarcoma.\nMay also be seen in osteosarcoma, and osteomyelitis", 'role': 'assistant'}]