This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
Agent used for sterilization - 
Select and explain. 
A. Ethylene oxide, B. Ionizing radiation, C. 2% gluteraldehyde, D. Formaldehyde with low pressure steam
A: Ethylene oxide
Answer: A: Ethylene oxide 
Explanation: All are disinfectants but ethylene oxide is used for sterilizing hea-lung machines ,respiratory sutures ,dental equipments books and clothings. it is unsuitable for fumigating rooms because of its explosive propey. it has been successfully used to sterilise a wide range of materials such as glass metal and paper surfaces clothing plastics soils some foods and tobacco REF:Ananthanarayan & Panicker's Textbook of Microbiology 8th edition pg no:37