Microbiology General 8fa8163a Endoscope tube is sterilized by? A Glutaraldehyde B Formalin C Autoclaving D Boiling High-Yield Explanation Ans. is 'a' i.e., Glutaraldehyde 2% Glutaraldehyde (cidex) is most often used for equipment such as endoscope that cannot be sterilized or disinfected by heat.