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: Pathology
[{'content': 'Where is onion bulb appearance on nerve biopsy seen in? \nSelect and explain. \nA. Amyloid neuropathy, B. Diabetic neuropathy, C. CIDP, D. Leprous neutitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: . CIDP', 'role': 'assistant'}]