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': 'Bone tumor arising from epiphysis is? \nSelect and explain. \nA. Osteoid osteoma, B. Chondrosarcoma, C. Ewings sarcoma, D. Chondroblastoma', 'role': 'user'}, {'content': "Answer: D \nExplanation: ANSWER: (D) ChondroblastomaREF: Apley's orthopedics 8th e p. 184-190SiteTumorEpiphyses* Osteochondroma* Osteoclastoma( giant cell tumor)* ChondroblastomaMetaphyses* Chondrosarcoma* Enchondroma* Osteochondroma* Osteoblastoma* Bone cyst* Osteosarcoma* Osteoclastoma in childrenDiaphysis* Round cell lesions* Ewing's sarcoma* Multiple myeloma* Reticulum cell sarcoma* Admantinoma* Osteoid osteoma* Cortical fibrous dysplasiaDiaphyseo-metaphyseal* Fibrous dysplasia* Chondromyxoid fibroma* Fibrosarcoma* Fibroxanthoma* Fibrous cortical defect* Non ossifying fibroma", 'role': 'assistant'}]