Which of the following was the first antibiotic discovered by Alexander Fleming in 1928?
a) Penicillin
b) Prontosil
c) Streptomycin
d) Tetracycline
Which of the following was the first antibiotic discovered by Alexander Fleming in 1928?
a) Penicillin
b) Prontosil
c) Streptomycin
d) Tetracycline
