This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lower limb, Subject name: Anatomy
Nerve supply of obturator internus is by 
Select and explain. 
A. L1-L3, B. L4-S1, C. L5-S2, D. S1-S3
C: L5-S2
Answer: C: L5-S2 
Explanation: OBTURATOR INTERNUS Fan-shaped Belly lies in pelvis and tendon in gluteal region.Action: lateral rotators of thigh at hip joint.supplied by nerve to obturator internus.Root value: L5,S1,S2Branches: obturator internus and superior gamellus.{Reference: BDC 6E page no.173}