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Science · 2023 · 1 mark
CBSE 2023 · Region 1 · Set 3 · Q20
Assertion (A): Left atrium receives oxygenated blood from pulmonary vein. Reason (R): Right atrium transfers deoxygenated blood to the right…
Assertion (A) : Left atrium receives oxygenated blood from pulmonary vein.
Reason (R) : Right atrium transfers deoxygenated blood to the right ventricle, which pumps it to the lungs for oxygenation.
Official answer
(B)
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
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CBSE Class 10 Science past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.