<prompt> The site of lesion in Korsakoffs psychosis is :Frontal lobeCorpus striatumMammilary bodyCingulate gyms  <response>: Wernickes encephalopathy : Thalamus, mammillary bodies, midline cerebellum, periaqueductal gray matter of midbrain, and peripheral nerves.Korsakoffs syndrome : Atrophy of Mammillary body, medial thalamic nuclei, and hippocampus. 