This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: TB of the Spine, Subject name: Orthopaedics
[{'content': 'In TB spine the first symptom is: \nSelect and explain. \nA. Decreased sensation, B. Decreased motor power, C. Pain, D. Increased deep tendon reflexes.', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Pain Back pain is the commonest presenting complaint.", 'role': 'assistant'}]