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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Krishan k jakhad
two largest veins in the body are the superior vena cava, which carries blood from the upper body, and the inferior vena cava, which carries blood from the lower body directly to the right atrium. after this The pulmonary veins are the veins that transfer oxygenated blood from the lungs to the heart. The largest pulmonary veins are the four main pulmonary veins, two from each lung that drain into the left atrium of the heart...via common pulmonary vein. so pulmonary vein will be the answer.best wishes 😃