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': 'Sterilization control used in membrane filters is \nSelect and explain. \nA. B pumilis, B. B stereo thermophilus, C. C tetani, D. Brevundimonas diminuta', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Sterilization control for membrane filters is Brevundimonas diminuta and sarratia\xa0marcescens.', 'role': 'assistant'}]