This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Which of the following is most active against both dormant & non-dormant bacilli - \nSelect and explain. \nA. Pyrazinamide, B. Rifampicin, C. Streptomycin, D. INH', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Rifampin Isoniazid is bacteriostatic for resting bacilli, but is bactericidal for rapidly dividing microorganisms. o The bactericidal action of rifampicin covers all subpopulations of TB bacilli.", 'role': 'assistant'}]