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
Structure passing deep to sacrococcygeal ligament are all except 
Select and explain. 
A. S5 nerve, B. Coccygeal nerve, C. Filum terminale, D. Internal pudendal aery
D: Internal pudendal aery
Answer: D: Internal pudendal aery 
Explanation: Ans: D Internal pudendal aerylRef. Textbook of human anatomy Pa-3 p. 811Structures passing through sacral hiatus (deep to sacrococrygeal ligament) are :-5th sacral nerveCoccygeal nerveFilum terminale