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
All are examples of coical dementia except 
Select and explain. 
A. Alzheimer's disease, B. Multiple sclerosis, C. Creutzfeldt Jacob disease, D. Pick's disease
B: Multiple sclerosis
Answer: B: Multiple sclerosis 
Explanation: B i.e Multiple sclerosis