This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Classification of Bone Tumors, Subject name: Orthopaedics
[{'content': 'All of the follow ing are diaphyseal tumors except- \nSelect and explain. \nA. Ewings sarcoma, B. Histiocytosis, C. Fibrosarcoma, D. Aneurysmal bone cyst', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Aneurysmal bone cyst Sites of tumorsEpiphyseal tumorsMetaphyseal legionsDianhvseai lesionso Chondroblastomao Giant cell tumor (osteoclastoma)o Clear cell chondrosarcomao Osteogenic sarcomao Unicameral (simple) bone cysto Aneuiysmal bone cysto Fibrous cortical defecto Chondrosarcomao Osteochondromao Enchondromao Osteoblastomao Ewring sarcomao Lymphomaso Fibrous dysplasiao Adamantinomao Histiocytosiso Osteoid osteomao Chondromyxoid fibromao Fibrosarcomao Fibrous cortical defecto Non ossifying fibroma", 'role': 'assistant'}]