This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Microbiology
[{'content': 'Endocopes are usually disinfected with: \nSelect and explain. \nA. Glutaraldehyde, B. Isopropyl alcohol, C. Gamma irradiation, D. Ethylene oxide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref: Ananthanarayan, Paniker CJ. Textbook of Microbiology. 6th Ed. London: John Wiley & Sons: 2000.Explanation:DisinfectantActive againstUseEthyl alcoholBactericidal but not sporicidalSkin antisepticsIsopropylalcoholBactericidal but not sporicidalDisinfection of suture material, clinicalthermometersMethyl alcoholActive against bacterial and fungal sporesCabinets & incubatorsFormaldehydeBactericidal, sporicidal & virucidalOT fumigationGiutaraldehydeBactericidal, sporicidal & virucidal (less toxic/ irritant)Bronchoscopes,endoscopes, cystoscopesHypochloriteBactericidal, sporicidal & virucidalBlood spillChlorhexidinebactericidal, moderate sporicidal & virucidalTreatment of woundsEthylene oxideBactericidal, sporicidal & virucidal (highly penetrating gas)Heart lung machines, respirators, dental equipement', 'role': 'assistant'}]