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: Anaesthesia
Pudendal nerve block involves 
Select and explain. 
A. Ll, L2, L3, B. L3, L4,L5, C. Sl, S2, S3, D. S2, S3, S4
D: S2, S3, S4
Answer: D: S2, S3, S4 
Explanation: S2, S3, S4