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 slowly dividing tubercular bacilli ? \nSelect and explain. \nA. Isoniazid, B. Rifampicin, C. Streptomycin, D. Ethambutol', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Rifampicin", 'role': 'assistant'}]