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': 'Plasma sterilization accuracy is assessed using: \nSelect and explain. \nA. Bacillus subtilis, B. Bacillus stereo thermophilus, C. Staphylococcus aureus, D. Clostridium tetani', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Bacillus stereo thermophilusHot air ovenClostridium tetani non-toxigenic strain, B. subtilis subsp nigerAutoclaveB. stearothermophillus, B. subtilis subsp nigerFiltrationBrivundimonas dimunata, SerratiaIonizing radiationB. pumilusEthylene oxideB. GlobigiPlasma sterilizationB. stearothermophillus, B. subtilis subsp niger", 'role': 'assistant'}]