The partial pressure of oxygen at the site a (alveoli of lungs ) and B (oxygenated blood ) is

Options

A. A : 104 mm Hg B : 95 mm Hg
B. A : 159 mm Hg B : 95 mm Hg
C. A : 104 mm Hg B : 40 mm Hg
D. A : 159 mm Hg B : 95 mm Hg

Answer

A