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: Gynaecology & Obstetrics
The nerve root blocked in pudendal block is 
Select and explain. 
A. L 1,2,3, B. L 2,3, C. S 2,3,4, D. S 4
C: S 2,3,4
Answer: C: S 2,3,4 
Explanation: Pudendal nerve block : Pudendal nerve arises from S2,3,4. Doesn't relieve the pain of labor Cause perineal analgesia and relaxation Ref: Dutta Obs 9e pg 480.