Anaesthesia To prevent combustion during anesthesia what combination is used? A O2 25% & N2O 75% B O2 50% & N2O 50% C O2 25% & He 75% D O2 75% & N2O 25% 💡 Explanation To prevent combustion during anesthesia what combination is used? ✓ Correct Answer: C. O2 25% & He 75%