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': 'Tyndallization is a method of \nSelect and explain. \nA. Growing bacteria in pure culture, B. Sterilization, C. Inoculation of media, D. Preserving cultures', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]