Who discovered the first antibiotic?

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John Dalton

Pasteur

Alexander Fleming

answer is A.

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Detailed Solution

Antibiotics are chemical substances produced by microorganisms that are used to kill or inhibit the growth of other microorganisms like bacteria and fungi.

Alexander Fleming discovered penicillin, the first antibiotic in 1928. He extracted the substance from the mould Penicillium notatum.

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