<prompt> Maximum CO2 is seen in ?Pulmonary veinPulmonary aeryLeft ventricleLeft atrium  <response>: Ans. is b i.e., Pulmonary aeryPulmonary aeries carry deoxygenated blood with maximum CO2 to lung from right ventricle.In lung CO2 is removed and oxygenation of blood takes place.Pulmonary veins, then, transpo this oxygenated blood with less CO2 to the left atrium. 