<prompt> Which of the following fluoroquinolone has broadest spectrum activity against bacteria ?CiprofloxacinNorfloxacinTrovafloxacinNalidixic acid  <response>: Ans. isci.e., TrovafloxacinFouh generation quinolonesfluoroquinolones have broadest spectrum.These are trovafloxacin, fleroxacin, gemifloxacin, prulifloxacin, sitafloxacin and clinafloxacin. 