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': 'Conduction in which type of nerve fibres is blocked maximally by pressure \nSelect and explain. \nA. C fibres, B. A- alpha fibres, C. A - Beta, D. A- gamma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The velocity of conduction through a nerve fiber is directly proportional to the thickness of the axon.\nThickest and fastest is A fibers. Among A fibers, the thickest is\xa0Aα. Hence the maximum affected by pressure will be\xa0Aα.', 'role': 'assistant'}]