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
Structures passing through the greater sciatic foramen are all of the following except - 
Select and explain. 
A. Pyriformis, B. Superior gluteal nerve, C. Inferior gluteal nerve, D. Obturator nerve
D: Obturator nerve
Answer: D: Obturator nerve 
Explanation: Structures passing through greater sciatic foramen.
Piriformis
Above Piriformis

   Superior gluteal nerve and vessels

Below Piriformis

   Inferior gluteal nerve and vessels
   Sciatic nerve
  Posterior cutaneous nerve of thigh
   Nerve to quadratus femoris
   Pudendal nerve
   Internal pudendal vessels
   Nerve to obturator internus