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
Subcoical dementia is seen in all except ? 
Select and explain. 
A. Parkinsonism, B. Alzheimer's disease, C. Wilson's disease, D. Huntingtons chorea
B: Alzheimer's disease
Answer: B: Alzheimer's disease 
Explanation: Ans.B. Alzheimer's diseaseSubcoical 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.Alzheimer's disease causes coical dementia.