Microbiology General Microbiology (Sterilization and Bacterial Genetics) 8c75557d For hot air oven holding time at 160degC is A 2 hour B 15 minutes C 30 minutes D 20 minutes High-Yield Explanation Recommended holding time of hot air oven At 160 C is 1.5-2 hour At 170 C for 60 min At 180 C is 30 min