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: Anatomy
Most common site of Ewings sarcoma 
Select and explain. 
A. Upper end of tibia, B. Shaft of tibia, C. Lower end of femur, D. Shaft of femur
D: Shaft of femur
Answer: D: Shaft of femur 
Explanation: Most common site of Ewings sarcoma is diaphysis of femur followed by diaphysis of tibia Refer : Textbook of skeletal oncology p 315