This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
[{'content': 'The conduction velocity of C fibers is about: M/second \nSelect and explain. \nA. 2, B. 5, C. 10, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The conduction velocity of c type nerve fibers is about 2 M/second They are non myelinated and has least diameter Ref:Guyton and Hall textbook of medical physiology 12th edition,page number,: 73', 'role': 'assistant'}]