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': "All are examples of cortical dementia except - \nSelect and explain. \nA. Alzheimer's disease, B. Multiple sclerosis, C. Creutzfeldt Jacob disease, D. Pick's disease", 'role': 'user'}, {'content': "Answer: B \nExplanation: In multiple sclerosis, subcortical dementia occurs.\nAlzheimer's disease, Pick's disease and CJD cause cortical dementia.", 'role': 'assistant'}]