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': "Subcortical dementia is seen in all except - \nSelect and explain. \nA. Parkinsonism, B. Alzheimer's disease, C. Wilson's disease, D. Huntingtons chorea", 'role': 'user'}, {'content': "Answer: B \nExplanation: Subcortical dementia is seen in parkinsonism, Huntington's disease, Wilson's disease, progressive supranuclear palsy, idiopathic basal ganglion calcification (Fahr's disease), thalamic lesions, multiple sclerosis, HIV associated dementia and multisystem atrophy.\nAlzheimer's disease causes cortical dementia.", 'role': 'assistant'}]