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: Physiology
[{'content': 'Velocity of conduction for A alpha fibers is \nSelect and explain. \nA. 70-120 m/s, B. 30-70 m/s, C. 12-30 m/s, D. 0.5-2 m/s', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]