<prompt> Bacteriostatic anti - TB drug isPyrazinamideINHRifampinEthambutol  <response>: Ans. is d i.e., Ethambutol All first line drugs are tuberculocidal except ethambutol which is tuberculostatic: Tuberculocidal: Rifampin, INH, streptomycin, pyrazinamide. Tuberculostatic : Ethambutol, PAS, cycloserine, thioacetazone. 