If bacteria are cultured in a Petri dish with discs that contain antibiotics, zones of inhibition of bacterial growth will form. The chart presents the diameters of the zones of inhibition when a species of bacteria was incubated on five separate agar plates, each with a disc carrying a different antibiotic. Which conclusions can be drawn about the most and least effective antibiotics for this species of bacteria?
- Amost effective antibiotic 3; least effective antibiotic 2
- Bmost effective antibiotic 4; least effective antibiotic 3
- Cmost effective antibiotic 3; least effective antibiotic 1
- Dmost effective antibiotic 2; least effective antibiotic 3