Microbiology Please explain why answer A is the correct answ

Microbiology.... Please explain why answer A is the correct answer.

You discover a new antibiotic that can kill 99% of Vibrio cholera at only 0.1 mug/ml concentration. You predict the MBC to be: > 0.1 mug/ml 0.1 mug/ml

Solution

Answer b. 0.1microgram/mL

The minimum bactericidal concentration (MBC) is the lowest concentration of an antibacterial agent required to kill a particular bacterium. The MBC is identified by determining the lowest concentration of antibacterial agent that reduces the viability of the initial bacterial inoculum by 99.9%.