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: Ophthalmology
Vitamin B12 deficiency is likely to cause: 
Select and explain. 
A. Bitemporal hemianopia, B. Binasal hemianopia, C. Heteronymous hemianopia, D. Centrocecal scotoma
D: Centrocecal scotoma
Answer: D: Centrocecal scotoma 
Explanation: D i.e. Cetrocecal scotoma Vitamin B12 deficiency is likely to cause optic neuritis; in which most common field defect is central or centro-caecal scotoma Q