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
All are sporicidal agents except - 
Select and explain. 
A. Formaldehyde, B. Glutaraldehyde, C. Ethylene oxide, D. Isopropyl alcohol
D: Isopropyl alcohol
Answer: D: Isopropyl alcohol 
Explanation: None