Question

Choose the correct order of flow of blood in systemic circulation in organisms possessing 4 chambered heart.

1. Right atrium → Left atrium → Lungs → Aorta

2. Pulmonary artery → Lungs → Pulmonary vein

3. Right atrium Right ventricle → Lungs → Systemic veins

4. Lungs → Left atrium → Left ventricle → Aorta​

Answer 1

Answer:

4th option is correct because the flow of oxygenated blood starts from lungs.

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Answer 2

Answer:

I think 3rd is the correct