Explanation

pulmonary vein carry oxygenated blood because it carry blood from lungs to left atrium.. inferior vena cava and superior vena cava carry deoxygenated.. and all veins carry deoxygenated blood except pulmonary vein.. superior vena cava carry the deoxygenated blood from uper part like head neck shoulder etc. while inferior vena cava carry the deoxygenated blood from lower part limbs etc of the body.