Penicillin was discovered by chance by:
AErnest Chain now
BHoward Florey now
CLouis Pasteur now
DAlexander Fleming
Answer & Solution
Correct answer: D. Alexander Fleming
1. The discovery came while working on Staphylococci.
2. A mould had contaminated the culture.
3. The discoverer was Alexander Fleming.
_Source: NCERT Class 12 Biology, Chapter 10, Microbes in Human Welfare._
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