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How was penicillin discovered?

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It was discovered during a search for new preservatives.

It was found when Alexander Fleming observed a Mould that inhibited the growth of Staphylococci bacteria.

It was synthesized by chemists looking for new forms of pain relievers.

It was a planned discovery based on genetic modification of molds.

answer is B.

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It was found when Alexander Fleming observed a Mould that inhibited the growth of Staphylococci bacteria.

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