CBSE 2023 · Region 3 · Set 1 · Q15 · 1 mark
Assertion (A) : More and more children in metro cities of India suffer from allergies and asthma due to sensitivity to the environment. Reason $\displaystyle (R)$ : Modern day lifestyle and a protected environment in early life has resulted in lowering the immunity.
Official answer
From CBSE’s own marking scheme for this paper.
(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Human Health and DiseaseImmunityAnalyseassertion_reasonmedium
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CBSE Class 12 Biology past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.