<prompt> Haemophilus influenzae has been isolated from the CSF of two year old boy suffering from meningitis. The strain is betalactamase producing and resistant to chloramphenicol. The most appropriate antimicrobial in such a situation isTrimethoprimsulfamethoxazole combinationCiprofloxacinThirdgeneration cephalosporinVancomycin  <response>: ANTIMICR BIALT RAPY. IF CNS ACTERIAL INFECTI NS BASED N PATHOGENa 