This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Microbiology (Sterilization and Bacterial Genetics), Subject name: Microbiology
Sterrad is a gas plasma sterilizer used in operation theaters for disinfecting OT aicles. Which of the following is the active agent used in it? 
Select and explain. 
A. H2O2, B. N2O, C. Ozone, D. ETO gas
A: H2O2
Answer: A: H2O2 
Explanation: STERRAD Gas plasma sterilizer in which plasma i.e.4th stage of matter is sterilizedwith an active agent H2O2. This is very effective but it is also very costly