This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'All of the following structures passes through lesser sciatic foramen, EXCEPT: \nSelect and explain. \nA. Inferior gluteal vessels, B. Internal pudendal vessels, C. Pudendal nerve, D. Nerve to obturator internus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Structures passing through the lesser sciatic foramen are tendon of obturator internus, internal pudendal vessels and pudendal nerve. Structures passing through greater sciatic foramen are:Piriformis muscleSuperior and inferior gluteal vesselInternal pudendal vesselPudendal nerveSciatic nervePosterior femoral cutaneous nerveNerve to obturator internusQuadratus femorisStructures passing through both greater and lesser sciatic foramen:Pudendal nerveInternal pudendal vesselsNerve to obturator internusRef: BRS Gross Anatomy By Kyung Won Chung, page 97', 'role': 'assistant'}]