CBSE 2025 · Region 4 · Set 3 · Q5 · 1 mark
Allergy in humans is a result of release of the following chemicals from the mast cells :
Official answer
From CBSE’s own marking scheme for this paper.
(A)
Histamine and Serotonin
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CBSE Class 12 Biology past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.