This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Which of the following is a sterilizing agent? 
Select and explain. 
A. Diethyl ether, B. Ethylene oxide, C. Chlorhexidine, D. Ethyl alcohol
B: Ethylene oxide
Answer: B: Ethylene oxide 
Explanation: Ethylene oxide (ETO) is a sterilizing agent, Chlorhexidine and ethyl alcohol are disinfectant Sterilisation - Removal of all living microbes including spores from an object. Disinfection - Removal of all pathogenic microbes from the surface of an object Antisepsis - Removal of pathogenic microbes from the skin and mucous membrane Ref : Ananthanarayana textbook of Microbiology 9th edition Pgno : 33