The correct option is B deoxygenated blood, oxygenated blood
The right atrium of the heart receives deoxygenated blood from all the parts of the body through the superior vena cava and inferior vena cava. This deoxygenated blood then moves from the right atrium to the right ventricle. From the right ventricle, the blood moves to the lungs for oxygenation through the pulmonary artery.
After oxygenation, the oxygenated blood returns to the left atrium through the pulmonary vein which then further passes on to the left ventricle. Thus the right side of the heart carries deoxygenated blood and the left side of the heart carries oxygenated blood.