<prompt> In a normal resting person, breathing air at sea level with RQ of 0.8, Pa CO2 of 40mm Hg, Pi O2 of 149 mm Hg and Fi O2 of 21 . Calculate alveolar partial pressure of oxygen100 mm Hg90 mm Hg120 mm Hg80 mm Hg  <response>: From Alveolar Gas Equation,Alveolar partial pressure of Oxygen is 