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
All of the following structures pass through the greater sciatic foramen, EXCEPT: 
Select and explain. 
A. Piriformis muscle, B. Pudendal nerve, C. Inferior gluteal vessel, D. Internal pudendal vessel
B: Pudendal nerve
Answer: B: Pudendal nerve 
Explanation: Pudendal nerve courses through the lesser sciatic foramen. Structures passing through the lesser sciatic foramen are:Pudendal nerveInternal pudendal vesselsObturator internus tendonStructures passing through the greater sciatic foramen are:Sciatic nervePiriformis muscleInternal pudendal and inferior gluteal vesselsOther branches of the sacral nerve plexus Ref: Hoffman B.L., Schorge J.O., Schaffer J.I., Halvorson L.M., Bradshaw K.D., Cunningham F.G., Calver L.E. (2012). Chapter 38. Anatomy.