Anaesthesia Anaesthetic Equipments 6cc01577 PIN number of nitrous oxide is: A 2, 5 B 3, 5 C 2, 6 D 3, 6 High-Yield Explanation Ans: b (Nitrous oxide)Pin index for gasesOxygen-2,5Nitrous oxide-3,5Cyclopropane-3,6Air-1,5Nitrogen-1,4