What will be the ${\mathrm{pO}}_2$ and ${\mathrm{pCO}}_2$ in the pulmonary vein compared to those of alveolar air?

${\mathrm{pO}}_2$ lesser, ${\mathrm{pCO}}_2$  higher 

 ${\mathrm{pO}}_2$ lesser, ${\mathrm{pCO}}_2$ equal 

${\mathrm{pO}}_2$ higher, ${\mathrm{pCO}}_2$ lesser 

Both ${\mathrm{pO}}_2$and ${\mathrm{pCO}}_2$ lesser