Which of the following blood vessels delivers impure blood to the lungs for purification?

Correct option is B

Sol. Pulmonary artery carries deoxygenated blood from the right ventricle to lungs for oxygenation. Explanation of each option: ● (a) Pulmonary vein – Carries oxygenated blood from lungs to heart, not impure blood. ● (b) Pulmonary artery – Correct answer. Only artery that carries deoxygenated blood. ● (c) Portal vein – Carries blood from gastrointestinal tract to liver, not lungs. ● (d) Coronary artery – Supplies oxygen-rich blood to the heart muscles.