This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Circulation: Microcirculation and Lymphatic System, Subject name: Physiology
[{'content': 'Maximum CO2 is seen in- \nSelect and explain. \nA. Pulmonary vein, B. Pulmonary artery, C. Left ventricle, D. Left atrium', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Pulmonary artery o Pulmonary arteries carry deoxygenated blood (with maximum CO2) to lung from right ventricle,o In lung CO2 is removed and oxygenation of blood takes place.o Pulmonary veins, then, transport this oxygenated blood (with less CO2) to the left atrium.", 'role': 'assistant'}]