_______ carries oxygenated blood from lungs to heart.

Pulmonary vein

The correct answer is Option (3)- Pulmonary vein

Veins play a crucial role in the circulatory system by returning deoxygenated blood back to the heart after arteries have transported blood away. The inferior vena cava transports deoxygenated blood from the lower part of the body to the right atrium of the heart, while the superior vena cava carries deoxygenated blood from the upper part of the body. Unlike other veins, the pulmonary veins are unique as they carry oxygenated blood from the lungs to the left atrium of the heart. Renal veins, responsible for draining the kidneys, establish a connection between the kidneys and the inferior vena cava.