The correct answer would be oxygenated blood and left atrium.
The pulmonary vein returns the oxygenated blood from the lungs to the left atrium of the heart.
Explanation:
In human body, the oxygenated blood is transferred to the heart and the deoxygenated blood is carried away from the heart. This is done through a process called The pulmonary circulation or pulmonary cycle.
In this process of pulmonary cycle, the deoxygenated blood is taken away from the heart through the right ventricle or atrium to the lungs, which is brought back from the lungs as oxygenated blood to the left atrium of the heart.
In simple words, the deoxygenated blood exits from the right atrium and oxygenated blood enter the heart from the left atrium.
Learn more about Pulmonary Circulation at:
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