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': 'The most effective antitubercular drug against slow multiplying intracellular mycobacteria is : \nSelect and explain. \nA. Rifampicin, B. Isoniazid, C. Pyrazinamide, D. Ethambutol', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]