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': 'Preganglionic parasympathetic nerve fiber which supply pelvic viscera is/are; \nSelect and explain. \nA. Ventral rami of S2,3,4, B. Hypogastric plexus, C. Pudendal nerve, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. Ventral rami of Sz, S3 and S4', 'role': 'assistant'}]