This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
The persistent suppression of bacterial growth that may occur after limited exposure to some antimicrobial drug is called : 
Select and explain. 
A. Time dependent killing, B. Post antibiotic effect, C. Concentration dependent killing, D. Sequential blockade
B: Post antibiotic effect
Answer: B: Post antibiotic effect 
Explanation: Time dependent killing kinetics is shown by aminoglycosides. Here, the killing activity depends upon the length of time, plasma concentration is above MIC.
Concentration dependent killing is shown by β lactam drugs. Here, killing activity depends upon the ratio of plasma concentration to MIC.
Post-antibiotic effect is the suppression of bacterial growth after limited exposure to the antibiotic.