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
[{'content': 'Most common cause of fracture in hemophilic arthropathy- \nSelect and explain. \nA. Osteoporosis & restrictive joint movement, B. Cartilage destruction, C. Inflammatory arthropathy, D. Osteosclerosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]