Anaesthesia Second gas effect is A Displacement of N20 by Oxygen B Displacement of oxygen by N20 C Facilitation of inhalation of Halothane by N20 D Removal of oxygen by N20 from alveoli during recovery from general anaesthesia 💡 Explanation Second gas effect is ✓ Correct Answer: C. Facilitation of inhalation of Halothane by N20