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 ahritis causes destruction of \nSelect and explain. \nA. Upper end tibia, B. Lower end femur, C. Head of femur, D. Greater trochanter', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer-C. Head of femurTom smith ahritis is the septic 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.On examination : -Limb is shoHip morements are increased in all directions.There is instability with positive telescoping.', 'role': 'assistant'}]