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
Simple bone cyst is common in 
Select and explain. 
A. Upper end of Humerus, B. Upper end of Radius, C. Upper end of Femur, D. Lower end of Femur
A: Upper end of Humerus
Answer: A: Upper end of Humerus 
Explanation: None