Regarding carbon monoxide poisoning, the wrong statement
High-Yield Explanation
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.