Question

Arrange the following in order from highest to lowest Po_(2).

(1) P_O2 of pulmonary veins
(2) P_O2 of pulmonary artery
(3) P_O2 of alveolar air

a. 3,2,1
b. 3,1,2
C. 2,3,1
d. 2,1,3
e. 1,2,3