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': 'Thermatomyces is used in? \nSelect and explain. \nA. Sterilization standardization, B. Gram staining, C. Selective media preparation, D. Antibiotic sensitivity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a (Sterilization standardization). (Ref. Ananthnarayan, Microbiology, 4th ed., 26, 29)# For determining the efficiency of moist-heat sterilization = Spores of bacillus stearothermophilus.# For determining the efficiency of dry-heat sterilization = Spores of non-toxigenic strains of C.tetani.', 'role': 'assistant'}]