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': "Subcoical dementia is seen in all except : \nSelect and explain. \nA. Parkinsonism, B. Alzheimer's disease, C. Wilsoms disease, D. Huntingtons Chorea", 'role': 'user'}, {'content': "Answer: B \nExplanation: B i.e. Alzheimer's disease", 'role': 'assistant'}]