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 ? 
Select and explain. 
A. S1-3, B. S2-4, C. S3-5, D. S4,5
B: S2-4
Answer: B: S2-4 
Explanation: Ans. is 'b' i.e., S2-4 Pudendal Nerve Block It is a peripheral nerve block that provides local anesthesia over S 2-4 dermatomes (majority of perineum and inferior quaer of vagina) It does not block the superior bih canal so the mother is able to feel the uterine contractions.