This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bone Tumour, Subject name: Orthopaedics
Onion peel appearance in X-ray suggest: 
Select and explain. 
A. Osteogenic sarcoma, B. Ewing sarcoma, C. Osteoclastoma, D. Chondrosarcoma
B: Ewing sarcoma
Answer: B: Ewing sarcoma 
Explanation: Ans: b (Ewings sarcoma)Ref: Maheshwari Ortho, 3rd ed, p. 222, T 30.5