<prompt> Bacillus used to test the efficacy of Sterilization by Autoclave is?Bacillus subtilis.Bacillus pumilusBacillus stearothermophilusCoxiella burnetii  <response>: Various bacilli are used to check the efficacy of sterilization methods are:Autoclave- Bacillus stearothermophilusHot air oven- Bacillus subtilis subspecies nigerIonising radiation- Bacillus pumilus 