Penicillin was discovered by
The correct option is (D) Alexander Fleming
The discovery of penicillin by Alexander Fleming was purely coincidental. He saw a clean region around the Penicillium mould, but the remainder of the Petri plate was covered with bacterial colonies. It is generally agreed that the discovery of penicillin was one of the most significant advancements in the field of therapeutic medicine. Penicillin turned a life-saving chemical that was in restricted supply into a treatment that was readily accessible to a huge number of people.
Streptomycin is an antibiotic that was first used against tuberculosis. In 1943, Albert Schatz (a student of Waksman) discovered and isolated the antibiotic from Streptomyces griseus.
Ernst Chain and Florey were the ones who discovered and developed the procedures that increased the synthesis of penicillin by the mould and purified it.
Penicillin was discovered by Alexander Fleming.