This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'True about prion protein diseases is all, except- \nSelect and explain. \nA. Myoclonus is seen in 10% of the patients, B. Caused by infectious protein, C. Brain biopsy is diagnostic, D. Commonly manifest as dementia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: caused by ifectious prpteins.brain biopsy is daignostic REF:ANATHANARAYANAN MICROBIOLOGY NINTH EDITION PAGE.557', 'role': 'assistant'}]