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': "The following tumors are seen in metaphysis -a) Osteomyelitisb) Osteosarcomac) Chondrosarcomad) Osteoclastomae)  Ewing's sarcoma \nSelect and explain. \nA. a, B. c, C. bc, D. ad", 'role': 'user'}, {'content': "Answer: C \nExplanation: Metaphyseal lesions : - Osteogenic sarcoma, Unicameral (simple) bone cyst, Aneurysmal bone cyst, Fibrous cortical defect, Chondrosarcoma, Osteochondroma, Enchondroma, Osteoblastoma\nNote :\n\nsteomyelitis also occurs at metaphysis. However, question has been asked specifically for bone tumors.\nIf it would have been 'bone lesions' of metaphysis in the question, then osteomyelitis is also correct.", 'role': 'assistant'}]