This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nerves of Lower Extremity, Subject name: Anatomy
Nerve root of pudendal nerve is- 
Select and explain. 
A. S1 S2 S3, B. S2 S3 S4, C. S3-S4, D. S2-S3
B: S2 S3 S4
Answer: B: S2 S3 S4 
Explanation: Ans. is 'b' i.e., S2 S3 S4 o Has been explained in previous session