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
True about prion protein diseases is all, except- 
Select and explain. 
A. Myoclonus is seen in 10% of the patients, B. Caused by infectious protein, C. Brain biopsy is diagnostic, D. Commonly manifest as dementia
A: Myoclonus is seen in 10% of the patients
Answer: A: Myoclonus is seen in 10% of the patients 
Explanation: caused by ifectious prpteins.brain biopsy is daignostic REF:ANATHANARAYANAN MICROBIOLOGY NINTH EDITION PAGE.557