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
Structure which passes through greater sciatic foramen is 
Select and explain. 
A. Superior gluteal nerve and vessels, B. Tendon of obturator internus, C. Anterior cutaneous nerve of thigh, D. Semimembranosus tendon
A: Superior gluteal nerve and vessels
Answer: A: Superior gluteal nerve and vessels 
Explanation: GREATER SCIATIC FORAMEN:- Gateway of gluteal region.1. pyriformis: key muscle of the region. 2. structures passing above pyriformis.A. Superior gluteal nerve B. Superior gluteal vessels. 3. Structures passing below the pyriformis:-Inferior gluteal nerve and vessels.Sciatic nerve Posterior cutaneous nerve of thighPudendal nerve Nerve to quadratus femorisNerve to obturator internus.Internal pudendal vessels. LESSER SCIATIC FORAMEN:-Gateway of the perineal region.1. Tendon of obturator internus2. Pudendal nerve3. Internal pudendal vessels4. Nerve to obturator internus. <img src=" /> {Reference: BDC 6E pg no.74}