The Oxygenated blood is carried from lungs to left auricle by the pulmonary vein.

The pulmonary veins are responsible for carrying oxygenated blood from the lungs back to the heart. They are the only veins in the body that carry oxygenated blood. Let's break down the process of how oxygenated blood is carried from the lungs to the left auricle:

1. Oxygen Exchange in the Lungs:
- When we breathe in, oxygen enters our lungs and diffuses across the walls of the alveoli (tiny air sacs in the lungs) into the capillaries.
- The oxygen binds to hemoglobin in red blood cells, forming oxyhemoglobin.
- At the same time, carbon dioxide (a waste product) diffuses from the capillaries into the alveoli to be exhaled.

2. Pulmonary Veins:
- The oxygenated blood from the capillaries in the lungs enters into the network of pulmonary veins.
- The pulmonary veins collect the oxygenated blood from the lungs and transport it back to the heart.

3. Left Atrium:
- The pulmonary veins converge and enter the left atrium of the heart.
- The left atrium is one of the four chambers of the heart and is responsible for receiving the oxygenated blood returning from the lungs.

4. Left Ventricle:
- From the left atrium, the oxygenated blood flows into the left ventricle.
- The left ventricle is the chamber that pumps the oxygenated blood out of the heart to be delivered to the rest of the body.

5. Systemic Circulation:
- From the left ventricle, the oxygenated blood is pumped into the aorta, the largest artery in the body.
- The aorta branches into smaller arteries, which carry the oxygenated blood to all the organs and tissues in the body.
- At the capillaries, oxygen and nutrients are delivered to the cells, and waste products like carbon dioxide are picked up.

In conclusion, the pulmonary veins carry oxygenated blood from the lungs to the left auricle, which is then pumped into the left ventricle and distributed to the rest of the body through the systemic circulation.

Yep pulmonary vein is an exception vein because it carries oxygenated blood from lungs to left auricle so B is correct one