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: Microbiology
[{'content': 'Which of the following is NOT a prion disease? \nSelect and explain. \nA. Bovine spongiform encephalopathy, B. Transmissible mink encephalopathy, C. Scrapie, D. Progressive multifocal leucoencephalopathy', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Progressive multifocal leucoencephalopathy", 'role': 'assistant'}]