Medicine Early in an attack of asthma, which of the following sets of aerial blood values is most likely? A Normal PO2 and normal PCO2 B Normal PO2 and low PCO2 C Normal PO2 and elevated PCO2 D Low PO2 and low PCO2 💡 Explanation Early in an attack of asthma, which of the following sets of aerial blood values is most likely? ✓ Correct Answer: D. Low PO2 and low PCO2