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
Sacrotuberous ligament is not pierced by 
Select and explain. 
A. Coccygeal branch of Inferior gluteal nerve, B. Perforating cutaneous nerves, C. Posterior cutaneous nerve of thigh, D. Filaments of Coccygeal plexus
C: Posterior cutaneous nerve of thigh
Answer: C: Posterior cutaneous nerve of thigh 
Explanation: Sacrotuberous ligament is pierced by

Coccygeal branch of Inferior gluteal nerve
Perforating cutaneous nerves
Filaments of Coccygeal plexus