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': 'Local anesthetics depress transmission first in \nSelect and explain. \nA. Group A alpha-fibers, B. Group A bita-fibers, C. Group B fibers, D. Group C fibers', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Local anesthetics depress transmission in the group C fibre before they affect group A touch fibres. Ref: Ganong&;s Review of medical physiology;25th edition; pg: 95.', 'role': 'assistant'}]