<prompt> Disposable syringes are sterilized by ?AutoclaveCidex 2 glutaraldehydeEthylene oxideHot air oven  <response>: 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 16the p. 74. Other methods for sterilization of heat labile instruments Ionizing radiation Formaldehyde in combination with subatmospheric steam. 