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: Radiology
'Onion peel' appearance on radiograph is seen in: 
Select and explain. 
A. Giant cell tumor, B. Ewing's sarcoma, C. Osteogenic sarcoma, D. Multiple myeloma
B: Ewing's sarcoma
Answer: B: Ewing's sarcoma 
Explanation: Ans. Ewing's sarcoma