This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'All are physical methods of sterilisation except \nSelect and explain. \nA. Sunlight, B. Gases, C. Filtration, D. Heat', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Physical Methods of SterilizationHeatRadiationFiltration Chemical Methods of Sterilization: using toxic gasses Ex: ETO, Formalin gas Ref : Ananthanarayana textbook of Microbiology 9th edition Pgno : 33', 'role': 'assistant'}]