Pin index system for oxygen: (A) 1,5, (B) 2,5, (C) 4,5, (D) 3,5
Answer is B. Ans: (b) 2,5Ref: Miller's Anaesthesia 7th ed. / 675* Pin index for oxygen is 2, 5.* Cylinder of oxygen is black body with white shoulder.GasColor CodePin index positionBodyShoulderOxygenBlackWhite2,5Nitrous oxideBlueBlue3, 5CO2GrayGray1,6HeliumBrownBrown2,5AirGreyWhite/black quartered1,5