A) erythromycin
B) penicillin
C) streptomycin
D) tetracycline
Correct Answer: B
Solution :
: Penicillin is not produced by Streptomyces. Penicillin (the first antibiotic) is obtained from the mold (fungus) Penicillium notatum. It was discovered by Alexander Fleming in 1923. He was awarded Noble Prize for this research in 1945.
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