<prompt> A 45 year male with a history of alcohol dependence presents with confusion, nystagmus and ataxia. Examination reveals 6th cranial nerve weakness. He is most likely to be suffering from :Korsakoffs psychosisWernicke encephalopathyDeClerambault syndromeDelirium tremens  <response>: Confusion, nystagmus, ataxia and 6th cranial nerve weakness in an alcohol dependent patient suggest the diagnosis of Wernickes encephalopathy. 