The antibiotics listed here all have similar MICs. Please

Last updated: 7/8/2022

The antibiotics listed here all have similar MICs. Please choose the antibiotic that would be the best option for treatment. Antibiotic W Therapeutic index = 5 Antibiotic X Therapeutic index = 20 Antibiotic Y Therapeutic index = 100 Antibiotic Z Therapeutic index = 10