The correct answer is A. A. Fleming.
Penicillin was discovered by Alexander Fleming in 1928. He was a Scottish bacteriologist who was working at St Mary’s Hospital in London. He noticed that a mold had grown on one of his petri dishes and that the bacteria around the mold had died. He isolated the mold and named it Penicillium notatum. He then showed that penicillin could kill a wide range of bacteria, including those that cause pneumonia, meningitis, and scarlet fever.
Paul Ehrlich was a German physician and scientist who is considered one of the founders of modern pharmacology. He is
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