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: Medicine
[{'content': "Alcoholic presents with psychosis and memory loss. Probable diagnosis is: \nSelect and explain. \nA. Wernicke's encephalopathy, B. Wernicke's Korsakoff psychosis, C. Acute psychosis, D. None of the above", 'role': 'user'}, {'content': "Answer: B \nExplanation: Alcoholic patients with chronic thiamine deficiency may also have central nervous system (CNS) manifestations known as Wernicke's encephalopathy, consisting of horizontal nystagmus, ophthalmoplegia (due to weakness of one or more extraocular muscles), cerebellar ataxia, and mental impairment. When there is an additional loss of memory and a confabulatory psychosis, the syndrome is known as Wernicke-Korsakoff syndrome. Ref: Harrison's principle of internal medicine 17th edition, chapter 71.", 'role': 'assistant'}]