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: Surgery
[{'content': "Tom smith's ahritis is due to \nSelect and explain. \nA. Pyogenic infection in infancy, B. TB, C. RA, D. OA", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. Pyogenic infection in infancyTom smith ahritis is the sepfic ahritis of hip joint, occurs in infancy. At this stage head of the femur is cailaginous and is rapidly and completely destroyed by the pyogenic process.', 'role': 'assistant'}]