This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ohopaedics Q Bank, Subject name: Orthopaedics
[{'content': 'Tom smith septic ahritis affects? \nSelect and explain. \nA. Neck of infants, B. Hip joint of infants, C. Elbow joint of children, D. Shoulder joint in children', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tom Smith ahritis:* Septic ahritis of hip joint in < 1 year old(infants) * Complete destruction of femoral epiphysis leading to hyper-mobile hip joint and instability.', 'role': 'assistant'}]