CBSE 2024 · Region 5 · Set 3 · Q9 · 1 mark
The first antibiotic was discovered accidentally by A while working on B. 'A' and 'B' are $\displaystyle 1$
Official answer
From CBSE’s own marking scheme for this paper.
(D)
A - Fleming; B - Staphylococci
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CBSE Class 12 Biology past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.