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': 'The best method of sterilizaion of dusting powder is? \nSelect and explain. \nA. Autoclaving, B. Hot air oven, C. Inspissation, D. Tyndallisation', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Hot air oven", 'role': 'assistant'}]