This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Protein Synthesis Inhibitors, Subject name: Pharmacology
Time dependent Killing is exhibited by all the following drugs except: 
Select and explain. 
A. Ceftriaxone, B. Vancomycin, C. Gentamicin, D. Meropenem
C: Gentamicin
Answer: C: Gentamicin 
Explanation: * Time dependent killing(TDK) : Here, the killing activity depends upon the length of time, plasma concentration is above MIC. It is shown by:* Beta Lactams.* Vancomycin Concentration dependent killing(CDK) : Here, killing activity depends upon the ratio of plasma concentration to MIC.It is shown by:* Aminoglycosides.* Flouroquinolone* MetronidazoleSo, Gentamicin is the answer.