CBSE 2026 · Region 5 · Set 3 · Q16 · 1 mark
Assertion (A): Besides curdling of milk, LAB also improves its nutritional quality by increasing Vitamin B12.
Reason (R) : LAB, when present in the stomach checks disease-causing microbes.
Official answer
From CBSE’s own marking scheme for this paper.
(B)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Microbes in Human WelfareMicrobes in Household ProductsUnderstandassertion_reasonmedium
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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.