Select the correct statement from the following.

pCO₂ of alveolar air (40 mm Hg) equals that of oxygenated blood (40 mm Hg). pO₂ of oxygenated blood (95 mm Hg) is less than that of alveolar air (104 mm Hg). pCO₂ of alveolar air (40 mm Hg) is less than that of deoxygenated blood (45 mm Hg). pO₂ of deoxygenated blood (40 mm Hg) less than that of pCO₂ of systemic tissues (45 mm Hg).