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
[{'content': 'The nerve roots blocked in pudendal nerve block is : \nSelect and explain. \nA. L1,2,3, B. L2,3, C. S2,3,4, D. S4', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pudendal nerve arises from S2,3,4 roots Pudendal block will block all the roots. Ref: Datta Obs 9e pg 480.', 'role': 'assistant'}]