<prompt> The most effective antitubercular drug against slow multiplying intracellular mycobacteria ?RifampicinIsoniazidPyrazinamideEthambutol  <response>: Ans. is a i.e., Rifampicin o Isoniazid is bacteriostatic for resting bacilli, but is bactericidal for rapidly dividing microorganisms. -- G G o The bactericidal action of rifampicin covers all subpopulations of TB bacilli. 