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': 'Sacrotuberous ligament is pierced by \nSelect and explain. \nA. Perforating cutaneous nerve, B. Posterior femoral cutaneous, C. Superior gluteal nerve, D. Sciatic nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: A Perforating cutaneous nerveSacrotuberous ligament (STL) -Stabiliser of sacro-iliac joint.Connects bony pelvis to veebral column.Structure piercing STL - Perforating cutaneous nerve.Perforating cutaneous nerve:Cutaneous nerve that arises from the 52 and 53 nerve roots of the sacral plexus.Supplies lower medial pa of buttock.', 'role': 'assistant'}]