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: Surgery
[{'content': "Prions disease all are true except aEUR' \nSelect and explain. \nA. They are caused by infectious proteins, B. Biopsy of brain diagnostic, C. Neurodegenrative desease, D. Myoclonus found only in 10% cases", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Myoclonus found only in 10% cases Prions are infectious proteins that cause degeneration of the central nervous system They are infectious paicles that lack nucleic acid Prions are composed largely, if not entirely of PrP molecules', 'role': 'assistant'}]