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': 'HEPA filter is used to disinfect ? \nSelect and explain. \nA. Water, B. Air, C. Culture, D. Blood', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Air HEPA (High-efficiency paiculate air) filter is used to remove microorganisms from air. HEPA filter traps airborne paicles and microbes. It can remove > 95% of all paicles including microorganisms with a diameter > 0.3 p.m.", 'role': 'assistant'}]