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
Bone tumors arising from diaphysis -a) Chondrosarcomab) Ewing's tumorc) Osteoclastomad) Chondroblastoma e) Osteid osteoma 
Select and explain. 
A. ab, B. ad, C. bc, D. be
D: be
Answer: D: be 
Explanation: Diaphyseal lesions : - Ewing sarcoma, Lymphomas, Fibrous dysplasia, Adamantinoma, Histiocytosis, Osteoid osteoma, Chondromyxoid fibroma, Fibrosarcoma, Fibrous cortical defect. Non ossifying fibroma