An 80-Year-Old Patient Breathing Room Air Has an Arterial Blood

An 80-year-old patient breathing room air has an arterial blood gas analysis.Which of the following results does the nurse interpret as normal?

A) pH 7.32,PaO₂ 85 mm Hg,PaCO₂ 55 mm Hg,and O₂ saturation 90%
B) pH 7.38,PaO₂ 75 mm Hg,PaCO₂ 40 mm Hg,and O₂ saturation 92%
C) pH 7.42,PaO₂ 80 mm Hg,PaCO₂ 33 mm Hg,and O₂ saturation 98%
D) pH 7.52,PaO₂ 90 mm Hg,PaCO₂ 30 mm Hg,and O₂ saturation 94%