This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycobacterial Diseases (TB, Leprosy and MAC), Subject name: Pharmacology
[{'content': 'Best anti-tubercular drug against intermittently dividing mycobacteria is:- \nSelect and explain. \nA. Rifampicin, B. Pyrazinamide, C. Ethambutol, D. INH', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bacteria Present at Most effective drug Rapidly multiplying Wall of tubercular cavity Isoniazid Intermittently dividing (Spuers) In casseous necrosis Rifampicin Slow multiplying Inside the macrophages Pyrazinamide', 'role': 'assistant'}]