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: Orthopaedics
[{'content': 'Hong kong operation is done in \nSelect and explain. \nA. TB spine, B. TB Hip, C. TB Knee, D. Chronic osteomyelitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]