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Biology · 2025 · 1 mark
CBSE 2025 · Region 2 · Set 1 · Q15
Assertion (A): Streptococcus pneumoniae and Haemophilus influenzae are responsible for causing infectious disease in human beings. Reason (R): A…
Assertion (A) : Streptococcus pneumoniae and Haemophilus influenzae are responsible for causing infectious disease in human beings.
Reason (R) : A healthy person acquires the infection by inhaling the aerosols released by an infected person.
Official answer
(A)
Both (A) and (R) are true and (R) is the correct explanation of (A).
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CBSE Class 12 Biology past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.