This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Anatomy
The nerve roots blocked in pudendal nerve block is 
Select and explain. 
A. L1,2,3, B. L 2,3, C. S 2,3,4, D. S4
C: S 2,3,4
Answer: C: S 2,3,4 
Explanation: Pudendal nerve arises from S 2,3,4 roots