This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Management In Orthopedics, Subject name: Orthopaedics
When do you operate for prolapsed disc - 
Select and explain. 
A. Busy executive needs quick surgery, B. Only with weakness no pain, C. Severe pain interfering with activity and not relieved by rest and treatment of 8 weeks, D. Patient of P1D with difficulty in ambulation
C: Severe pain interfering with activity and not relieved by rest and treatment of 8 weeks
Answer: C: Severe pain interfering with activity and not relieved by rest and treatment of 8 weeks 
Explanation: Ans. is 'c' i.e., Severe pain interfering with activity and not relieved by rest and treatment of 8 weekso Indications for surgery in cases of Prolapsed intervertebral disc areFailure of conservative treatment (even after 8 weeks of treatment).Progressive neurological deficit.Cauda - equina syndrome.Severe sciatic tilt.