<prompt> Indicator used in autoclave is -Clostridium tetaniBacillus stearothermophilusBacillus pumilisBacillus subtilis Var Niger  <response>: Ans: b Bacillus stearothermophilus Ref: Ananthanarayan, 7th ed,p. 78 Autoclaving: Moist heat 121degC X 15 min under 15 lbsq.inch pressure - dressings, gloves, glass syringes, culture media, suture materials except catgut. Sterilizing control is by bacillus stearo thermophilus. Hot air oven: Dry heat 160degCX 1 hr-glasswares, glass syringes, oil, grease, liquid paraffin, dusting powder. Sterilization control is by spores of non toxigenic strains of Clostridium tetani. 