Who discovered the first antibiotic?
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Selman Waksman
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Alexander Fleming
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Ernst Chain
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Howard Florey
B
Correct answer
Explanation
Alexander Fleming discovered penicillin in 1928 when he noticed that mold (Penicillium) had contaminated his bacterial culture and was killing the bacteria, marking the first antibiotic discovery. Waksman coined the term 'antibiotic' but didn't discover the first one. Chain and Florey later helped purify and mass-produce penicillin.