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': 'Structure passing through lesser sciatic notch: \nSelect and explain. \nA. Tendon of obturator internus, B. Superior gluteal vessels, C. Superior gluteal nerve, D. Inferior gluteal nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lesser sciatic notchIt lies below the ischial spineIt is smooth, coated in the recent state with cailage, the surface of which presents two or three ridges corresponding to the subdivisions of the tendon of the Obturator internus, which winds over it.It is conveed into a foramen, the lesser sciatic foramen, by the sacrotuberous and sacrospinous ligaments, and transmits the tendon of the Obturator internus, the nerve which supplies that muscle, and the internal pudendal vessels and nerve.', 'role': 'assistant'}]