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: Medicine
Most common cause of fracture in hemophilic arthropathy- 
Select and explain. 
A. Osteoporosis & restrictive joint movement, B. Cartilage destruction, C. Inflammatory arthropathy, D. Osteosclerosis
A: Osteoporosis & restrictive joint movement
Answer: A: Osteoporosis & restrictive joint movement 
Explanation: None