This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'Complication of long-term hemophilia - \nSelect and explain. \nA. Joint deformity, B. Transfusion transmitted disease, C. Renal calculi, D. Severe iron deficiency anemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Complications of hemophilia may include: Deep internal bleeding. Bleeding that occurs in deep muscle can cause your limbs to swell. The swelling may press on nerves and lead to numbness or pain. and long term complication is joint deformities Ref Davidson 23rd edition pg 1010', 'role': 'assistant'}]