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: Social & Preventive Medicine
[{'content': 'Dose of rifampicin in RNTCP is- \nSelect and explain. \nA. 600 mg, B. 450 mg, C. 300 mg, D. 100 mg', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Under RNTCP Doses of first line antitubercular drugs are :- INH-600mg; rifampicin-450mg; pyrazinamide- 1500mg; ethambutol-1200mg; and streptomycin-750mg.\nAll drugs are given three times in a week, e.g. 450 mg rifampicin is given three times in a week.', 'role': 'assistant'}]