This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Development of GU system and Neuro-vascular supply of pelvis & perineum, Subject name: Anatomy
[{'content': "Which of the following structure doesn't pierce sacrotuberous ligament \nSelect and explain. \nA. Inferior gluteal aery, B. Perforating cutaneous nerve, C. Posterior femoral cutaneous nerve, D. Coccygeal plexus", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sacro - tuberous ligament. Structures piercing sacro-tuberous ligament are coccygeal branches of inferior gluteal aery perforating cutaneous nerve filaments of coccygeal plexus.', 'role': 'assistant'}]