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

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