<prompt> All are methods of sterilization except -Ionizing radiationEthylene oxideFormaldehydeChlorhexidne  <response>: Ans. is d i.e., Chlorhexidne Sterilizationo The process by which an article surface or medium is freed of all living microorganisms either in the vegetative or spore state - Complete absence of microorganism.Disinfectiono Destruction or removal of all pathogenic organisms capable of giving rise to infection - reduction in the microorganisms to such a level which is deemed no longer harmful to health.o Various methods of sterilization and disinfection areMethodsSterilizationDisinfection1 Heat1 Heat2 Ionizing radiations b electron irradiation g photon irradiation2 U.V. radiation3 Gases4 Filtration3 Filtration5 Chemicals4 Sterilant gases Ethylene oxide Formaldehyde Alcohols Chlorhexidine Glutaraldehyde5 Sterilant liquids Glutaraldehyde Hypochlorites Iodine Phenolic compounds 