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: Microbiology
Gluteraldehyde is used to sterilize- 
Select and explain. 
A. Endoscopes, B. Corrugated rubber anaesthetic tube, C. Plastic endotracheal tube, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: o 2% Glutaradehyde (cidex) is an aldehyde disinfectant with a broad spectrum of action against bacteria, fungi, viruses, as well as spores (slow action)
o It is most often used for equipment such as endoscopes that cannot be sterilized or disinfected by heat (cytoscopes bronchoscopes)
o Glutraldehyde is used for -
i) Cystoscopes and bronchoscopes
ii) Corrgated rubber anaesthetic tubes
iii) Face masks
iv) Plastic endotracheal tubes
v) Polythene tubing
vi) Endoscopes