Pulmonary veins of Frog open into

Sinus venosus

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Right auricle

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Left auricle

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Truncus arteriosus

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Solution

The correct option is D Left auricle
Blood vessels, which carry the deoxygenated blood from different parts of the body to the heart, are called veins. They constitute a system called venous system. Only pulmonary veins have oxygenated blood while all the other veins have deoxygenated blood. Blood from the right and left lungs come to the left auricle/atrium of the heart through pulmonary veins.
So the correct answer is 'Left auricle'.

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