This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Spinal injuries, Subject name: Orthopaedics
Test used for prolapsed lumbar interveebral disc is- 
Select and explain. 
A. Active straight leg raising test, B. Lasegue test, C. Thomas test, D. Apley's grinding test
B: Lasegue test
Answer: B: Lasegue test 
Explanation: Essential ohopaedics , Maheshwari, 9th edition ,pg.no.255 Lasegue test is a modification of SL where the first the hip is lifted to 90deg with the knee bent . The knee is then gradually extended by the examiner, if nerve stretch is present ,it will not be possible to do so & patient will experience pain in the back of thigh or leg.