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: Anatomy
[{'content': 'Nerve root of pudendal nerve is - \nSelect and explain. \nA. S 1S2S3, B. S2S3S4, C. S3-S4, D. S2-S3', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pudendal nerve- S2,3,4', 'role': 'assistant'}]