<prompt> Vitamin B12 deficiency is likely to cause -Bitemporal heminanopiaBinasal hemianopiaHeteronymous hemianopiaCentrocecal scotoma  <response>: 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 6e 