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': 'Prions are killed by \nSelect and explain. \nA. Autoclave and NaOH, B. Ethylene dioxide, C. Gamma radiation, D. Autoclave', 'role': 'user'}, {'content': 'Answer: A \nExplanation: prions are killed by autoclave.', 'role': 'assistant'}]