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: Medicine
[{'content': 'All of the following statements about Creutzfeldt-Jakob disease are true, Except - \nSelect and explain. \nA. It is a neurodegenerative disease., B. It is caused by infectious proteins, C. Myoclonus is rarely seen, D. Brain biopsy is specific for diagnosis.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]