<prompt> Which of the following doesnt have any effect on pseudomonas?TicaracillinCarbenicillinAzlocillinNaficillin  <response>: Nafcillin is a narrow-spectrum bactericidal antibiotic agent of the penicillin class. It is useful for susceptible infections due to penicillinase-producing staphylococci. Piperacillin and Mezlocillin also acts on pseudomonas. 