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': 'Best method of sera sterilization is: \nSelect and explain. \nA. Filtration, B. Autoclaving, C. Radiation, D. Heating', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Filtration is the best method of sterilization of heat labile liquids such as sera and solutions of sugars or antibiotics, toxins and vaccines. It helps to remove bacteria.', 'role': 'assistant'}]