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
[{'content': 'Structure passing through both greater and lesser sciatic foramen is \nSelect and explain. \nA. Pudendal nerve, B. Sciatic nerve, C. Superior gluteal nerve, D. Inferior gluteal nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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}', 'role': 'assistant'}]