This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: RNTCP, Subject name: Social & Preventive Medicine
[{'content': 'Multidrug resistance in TB is defined as resistance to:- \nSelect and explain. \nA. Streptomycin, Rifampicin and Isoniazid, B. Streptomycin and Rifampicin, C. Isoniazid and Rifampicin, D. Streptomycin and Isoniazid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Multi-drug-resistant tuberculosis(MDR-TB) is caused by bacteria resistant to treatment with at least two most powerful first-line anti-TB medications (drugs), i.e isoniazid and rifampicin. Multi-drug-resistant tuberculosis(MDR-TB) can be treated by', 'role': 'assistant'}]