The diagrams illustrate the outcome of incubating two species of bacteria, P and R, on separate Petri dishes, each of which contains nutrient agar. Three filter paper discs have been placed on each Petri dish. Which statement is correct?
- AAntibiotics X and Y are resistant to bacteria P.
- BBacteria P are resistant to both antibiotics.
- CBacteria R have a mutation that makes them resistant to antibiotic Y.
- DN is a control disc showing bacteria R grow when antibiotic Y is not present.