This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Organic Mental Disorders, Subject name: Psychiatry
[{'content': 'Features of lewy body dementia are all except: \nSelect and explain. \nA. Recurrent visual hallucination, B. Spontaneous motor feature, C. Autonomic dysfunction, D. Fluctuating cognition', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Revised criteria for the clinical diagnosis of Lewy body dementia: 1.Fluctuating Cognition 2.Recurrent Visual hallucination 3.REM sleep behaviour disorder 4.Cardinal feature of Parkinsonism (one or more)', 'role': 'assistant'}]