<prompt> Time dependent Killing is exhibited by all the following drugs except:CeftriaxoneVancomycinGentamicinMeropenem  <response>: Time dependent killingTDK : Here, the killing activity depends upon the length of time, plasma concentration is above MIC. It is shown by: Beta Lactams. Vancomycin Concentration dependent killingCDK : Here, killing activity depends upon the ratio of plasma concentration to MIC.It is shown by: Aminoglycosides. Flouroquinolone MetronidazoleSo, Gentamicin is the answer. 