All of the following are examples of bactericidal drugs except -

Ans. is 'c' i.e., Ethambutol o All first line drugs are tuberculocidal except ethambutol which is tuberculostatic. Tuberculocidal --> Rifampin, INH, streptomycin, pyrazinamide. Tuberculostatic --> Ethambutol, PAS, cycloserine, thioacetazone.