The spores of which bacterium are used to check efficacy of hot air oven:

Ans. C. Bacillus subtilisa. Spores of Bacillus subtilis are used as biological control in hot air oven sterilization.b. Spores of Bacillus atropheus are used as biological control in ETO sterilization.c. Spores of Bacillus pumilus are used as biological control of gamma sterilization.d. Spores and crystalline insecticidal proteins produced by B. thuringiensis have been used to control insect pests like mosquitoes.