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B
Pure blood from lungs to heart
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C
Impure blood from heart to lungs
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D
Pure blood from heart to lungs
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Solution
The correct option is B Pure blood from lungs to heart The pulmonary veins carry pure blood that is oxygenated blood from the lungs to the left atrium of the heart. Despite carrying oxygenated blood, this great vessel is still considered a vein because it carries blood towards the heart. This is an exception to all the other veins in the body.