What will be the pO2 and pCO2 in the atmospheric air compared to those in the alveolar air ? (i) pO2 lesser, pCO2 higher (ii) pO2 higher, pCO2 lesser (iii) pO2 higher, pCO2 higher (iv) pO2 lesser, pCO2 lesser

Atmospheric air has a pO₂ of approximately 159 mm Hg and pCO₂ around 0.3 mm Hg

Alveolar air shows pO₂ of about 104 mm Hg and pCO₂ near 40 mm Hg

This indicates that, compared to alveolar air, atmospheric air has higher pO₂ and lower pCO₂, making the correct choice:

• (ii) pO₂ higher, pCO₂ lesser