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': 'Triple deformity of the knee is a complication of: September 2012 \nSelect and explain. \nA. Tuberculosis, B. Osteoahritis, C. Septic ahritis, D. All of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. A i.e. Tuberculosis Skeletal TB MC site of skeletal TB: Veebrae In Spine, TB stas in: Veebral body MC region involved in spinal TB: T9-L1 Earliest symptom of spinal TB: Pain Earliest X-ray sign in Pott's disease: Narrowing of disc space", 'role': 'assistant'}]