CBSE 2026 · Region 4 · Set 3 · Q14 · 1 mark
Assertion (A) : The interaction between a whale and the small barnacles on its back is considered as commensalism.
Reason (R): In the above association, neither of the species is benefitted.
Official answer
From CBSE’s own marking scheme for this paper.
(C)
Assertion (A) is true, but Reason (R) is false.
Organisms and PopulationsPopulationsAnalyseassertion_reasoneasy
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CBSE Class 12 Biology past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.