Answer :
Answer:
d.Pulmonary veins carry oxygen-rich blood to the heart.
Explanation:
Pulmonary veins carry blood form the lungs (where the blood is oxygenated) to the heart (left atrium). There are four main pulmonary veins.
Pulmonary veins are exceptions, because, usually veins carry oxygen-poor blood while arteries carry oxygenated blood.
The pulmonary veins are part of the pulmonary circulation.