<prompt> Which of the following drug is bactericidal?SulfonamidesErythromycinChloramphenicolCotrimoxazole  <response>: Primarily bactericidal: Penicillins Cephalosporins Aminoglycosides Vancomycin Polypeptides Nalidixic acid Rifampin Ciprofloxacin Isoniazid Metronidazole Pyrazinamide Cotrimoxazole ESSENTIALS OF MEDICAL PHARMACOLOGY K.D.TRIPATHI SIXTH EDITION PAGE NO:669 