This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuro-ophthalmology, Subject name: Ophthalmology
Vitamin B12 deficiency is likely to cause - 
Select and explain. 
A. Bitemporal heminanopia, B. Binasal hemianopia, C. Heteronymous hemianopia, D. Centrocecal scotoma
D: Centrocecal scotoma
Answer: D: Centrocecal scotoma 
Explanation: Vitamin B12 (also known as cobalamin) is an essential vitamin for neurological function. Vitamin B12 deficiency optic neuropathy is a rare complication of this deficiency that results in progressive, bilateral, painless vision loss that is often associated with reduced color vision and central or cecocentral scotomas. Ref AK khurana 6/e