The partial pressure of oxygen in the alveoli of the lungs is
equal to that in the blood
more than that in the blood
less than that in the blood
less than that of the carbon dioxide
Alveoli are the site of gaseous exchange and have a higher partial pressure of oxygen than that of blood. Blood is rich in carbon dioxide at cell and tissue level due to cellular respiration. The higher partial pressure of oxygen in alveoli allow diffusion of oxygen into the blood.
Hence the correct answer is 'more than that in the blood'