A microbiology student conducted the tube-dilution method using a series of tubes containing sterile medium and various concentrations of a variety of antibiotics. The tubes were inoculated with a test bacterium. If penicillin G had a MIC of 25µg/µl, erythromycin had a MIC of 50µg/µl, and doxycycline has a MIC of 10µg/µl, which of the following correctly ranks these antibiotics according to their antimicrobial activity against the bacterium, from the highest activity to lower?
A. Erythromycin, penicillin G, doxycycline
B. Erythromycin, doxycycline, penicillin G
C. Doxycycline, penicillin G, erythromycin
D. Doxycycline, erythromycin , penicillin G
E. Penicillin G, erythromycin, doxycycline. Get Immunology Help Today
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