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': "Main symptom of Korsakoff's psychosis is? \nSelect and explain. \nA. Ataxia, B. Global confusion, C. Opthalmoplegia, D. Confabulation", 'role': 'user'}, {'content': "Answer: D \nExplanation: Korsakoff 's psychosis consists of an anterograde and retrograde amnesia. Confabulation is classically described in Korsakoff dementia, although it may be present in other dementias. Confabulation represents filling in of memory gaps with data the patient can readily recall.", 'role': 'assistant'}]