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': 'Sacrospinous ligament is crossed by all, EXCEPT: \nSelect and explain. \nA. Internal pudendalaretry, B. Internal pudendal vein, C. Nerve to obturatorinternus, D. None of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: The ischial spine projects downwards and a little medially. The sacrospinous ligament is attached to its margins, separating the greater from the lesser sciatic foramen. The ligament is crossed posteriorly by the internal pudendal vessels and the nerve to obturatorinternusRef: Gray's anatomy 40th edition, Chapter 111", 'role': 'assistant'}]