Regarding carbon monoxide poisoning

• A. CO has an affinity for Hb that is about 2000 times that of oxygen
• B. Hyperbaric oxygen is indicated as a treatment for all patients with CO Hb levels >20%
• C. The average concentration of CO in the atmosphere is about 0.1ppm
• D. With room air at 1atm the elimination half time of CO is about 80 minutes
• E. The foetus is resistant to the effects of CO exposure