This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, 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: (Ref: Katzung 10/e p756) Time dependent killing kinetics is shown by aminoglycosides. Here, the killing activity depends upon thelength of time, plasma concentration is above MIC. Concentration dependent killing is shown by b lactam drugs. here, killing activity depends upon the ratio of plasma concentration to MIC. Post antibiotic effect is the suppression of bacterial growth after limit exposure to antibiotic.