Antimicrobials effective against anaerobic bacteria include the following EXCEPT:: (A) Tobramycin, (B) Clindamycin, (C) Chloramphenicol, (D) Metronidazole
Answer is A. (Ref: KDT 6/e p719, 720) Aminoglycosides require oxygen for transpo in the bacterial cell. These are therefore ineffective against anaerobic organisms.