This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
Sub coical dementia is seen in all except 
Select and explain. 
A. Multiple sclerosis, B. Alzheimer's disease, C. Parkinson's disease, D. HIV related dementia
B: Alzheimer's disease
Answer: B: Alzheimer's disease 
Explanation: People with these types of dementia usually have severe memory loss and can't remember words or understand language.Alzheimer's and Creutzfeldt-Jakob disease are two forms of coical dementia.Subcoical dementias happen because of problems in the pas of the brain beneath the coex. Ref ganong's review of medical physiology 25e p751