This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Medicine
Vitamin B12 deficiency can lead to all EXCEPT: 
Select and explain. 
A. Myopathy, B. Peripheral neuropathy, C. Optic atrophy, D. Myelopathy
A: Myopathy
Answer: A: Myopathy 
Explanation: Myelin formation requires B12 If B12| - myelination | | So, 1) Peripheral neuropathy 2) Optic atrophy 3) Myelopathy But Not Myopathy 4) SACD spinal cord (Sub-acute combine degeneration of spinal cord)