Regarding carbon monoxide poisoning, the wrong statement
Since Hb has more affinity to CO than oxygen, it results in anaemic hypoxia. PO2 remain normal as it is the dissolved form. Hb-O2 dissociation curve shifts to left. Treatment for CO poisoning is by hyperbaric oxygen. But 95% O2 + 5% CO2 can also be used. CO is a gaseous vasodilator.
Oxygen dissociation curve shifted to right
Oxygen dissociation curve shifted to left
COHb is formed
Hyperbaric oxygen can be used