This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, 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 o HEPA (High-efficiency particulate air) filter is used to remove microorganisms from air.o HEPA filter traps airborne particles and microbes.o It can remove > 95% of all particles including microorganisms with a diameter >0-3 pm.", 'role': 'assistant'}]