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: Anatomy
[{'content': "EEG changes are useful in diagnosis of which of the following dementias \nSelect and explain. \nA. Alzheimer's, B. Pick's Dementia, C. Prion associated dementia, D. Vascular dementia", 'role': 'user'}, {'content': "Answer: C \nExplanation: CJD's are have characteristic spike patterns on EEG", 'role': 'assistant'}]