This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Auto claving is done in : 
Select and explain. 
A. Dry air at 121 degree C and 15 1b pressure, B. Steam at 100 deg C for 30 minutes, C. Steam at 121 deg C for 15 minutes, D. Dry air at 160 deg C for 30 minutes
C: Steam at 121 deg C for 15 minutes
Answer: C: Steam at 121 deg C for 15 minutes 
Explanation: None