This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gluteal Region, Subject name: Anatomy
Sacrotuberous ligament is pierced by? 
Select and explain. 
A. Nerve to obturator internus, B. Inferior gluteal artery, C. Superior gluteal artery, D. Sciatic nerve
B: Inferior gluteal artery
Answer: B: Inferior gluteal artery 
Explanation: Ans.(b) Inferior gluteal arteryRef: Gray's anatomy 40th ed., chapter 80