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
Percentage of glutaraldehyde used ? 
Select and explain. 
A. 1%, B. 2%, C. 3%, D. 4%
B: 2%
Answer: B: 2% 
Explanation: Ans. is 'b' i.e., 2% 2% Glutaradehyde (cidex) is an aldehyde disinfectant with a broad spectrum of action against bacteria, fungi, viruses, as well as spores (slow action).