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: Social & Preventive Medicine
Disposable syringes are sterilized by ? 
Select and explain. 
A. Autoclave, B. Cidex (2% glutaraldehyde), C. Ethylene oxide, D. Hot air oven
C: Ethylene oxide
Answer: C: Ethylene oxide 
Explanation: Ans. is 'c' i.e., Ethylene oxide "Ethylene oxide used mainly by industry for the sterilization of plastic and other thermolabile material that can not withstand heating" -- Greenwood 16th/e p. 74. Other methods for sterilization of heat labile instruments Ionizing radiation Formaldehyde in combination with subatmospheric steam.