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': 'Pudendal nerve supplying motor part to external sphincter is derived from - \nSelect and explain. \nA. L5-S1 roots, B. S1-S2 .roots, C. L2-L3 roots, D. S2-S3 roots', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ventral division of sacral plexus gives rise to pudendal nerve. So the root value is S2-4', 'role': 'assistant'}]