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': "Subcoical 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: Coical dementia, ex: Alzheimer's disease, Pick's disease. Site of lesion is Coex(frontal & temporoparieto-occipital association areas, & hippocampus). Subcoical dementia, ex: Huntington's chorea, Parkinson's disease, progressive supranuclear palsy, Wilson's disease. Site of lesion is subcoical grey matter(thalamus, basal ganglia, & rostral brain stem). Reference: A sho textbook of Psychiatry by Niraj Ahuja, 7th edition, page 24.", 'role': 'assistant'}]