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': 'Axonotmesis includes discontinuity in \nSelect and explain. \nA. Perineurium, B. Epineurium, C. Endoneurium, D. Axon', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Axonotmesis is a disruption of nerve cell axon, with Wallerian degeneration occurring below and slightly proximal to the site of injury. If axons and their myelin sheath are damaged, but Schwann cells, the endoneurium, perineurium and epineurium remain intact, it is called axonotmesis.', 'role': 'assistant'}]