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: Medicine
[{'content': 'Vitamin B12 deficiency can give rise to all of the following except: \nSelect and explain. \nA. Myelopathy, B. Optic atrophy, C. Peirpheral neuropathy, D. Myopathy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]