This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Orthopaedics
[{'content': 'When do you operate for a prolapsed disc \nSelect and explain. \nA. Busy executive needs quick surgery, B. Only with weakness no pain, C. Severe paininterfering with activity and not relieved by rest and treatment of 8 weeks, D. Patient of PID with difficulty in ambulation', 'role': 'user'}, {'content': "Answer: C \nExplanation: Indications for surgery in cases of Prolapsed interveebral disc are:Progressive neurological deficitCauda-equina syndromeSevere sciatic tilt(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 234, 302)", 'role': 'assistant'}]