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: Psychiatry
[{'content': "An alcoholic presents with complaints of loss of memory of recent events, impaired insight, confabulation, and dementia of few months duration. The patient is suffering from : \nSelect and explain. \nA. Wernicke's encephalopathy, B. Korsakoff's psychosis, C. Delirium tremens, D. Binswanger's disease", 'role': 'user'}, {'content': "Answer: B \nExplanation: Loss of memory (amnesia) and confabulation in an alcoholic suggest the diagnosis of Korsakoff's psychosis.", 'role': 'assistant'}]