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
Most common site of osteoporosis- 
Select and explain. 
A. Humerus, B. Vertebrae, C. Scapula, D. Flat bones
B: Vertebrae
Answer: B: Vertebrae 
Explanation: Most common site of osteoporosis is vertebrae.