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': 'Wallarian degeneration is seen in \nSelect and explain. \nA. Distal to injury, B. Proximal to injury, C. At both ends, D. In cell body (soma)', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The destructive and constructive changes which occur in a nerve fibre after injury are called degeneration and regeneration respectively. The degenerative changes in distal pa of cut nerve fibre are Wallerian degeneration. Ref: guyton and hall textbook of medical physiology 12 edition page number: 74,75,76', 'role': 'assistant'}]