This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Microbiology
[{'content': 'Bacillus stearothermophilus is used as an indicator for- \nSelect and explain. \nA. Hot air oven, B. Radiation, C. Gas sterilization, D. Autoclaving', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Autoclaving Type of SterilizationSpore used* Moist heat (autoclave)Bacillus stearothermophilus* Dry heat (hot air oven)Bacillius subtilis* Ionizing radiationBacillus pumilis* Gas sterilization (ethylene oxide)Bacillus subtilis* Plasma sterilizationBacillus stearothemophilus(Geobacillus stearothermophilus)", 'role': 'assistant'}]