<prompt> A 40 year old mine worker is brought to the emergency room with a suspected carbon monoxide poisoning. What will be expected in the blood ABG?PO2 normal, O2 saturation less with slightly decreased PCO2PO2 less, O2 saturation normalPO2 high, O2 saturation normalPO2 less, O 2 saturation decreased  <response>: CO2 has 210 times more affinity to Hb than O2 so O2 saturation is less. PO2 is normal since dissolved O2 is normal. 