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
Multidrug resistance in TB is defined as resistance to:- 
Select and explain. 
A. Streptomycin, Rifampicin and Isoniazid, B. Streptomycin and Rifampicin, C. Isoniazid and Rifampicin, D. Streptomycin and Isoniazid
C: Isoniazid and Rifampicin
Answer: C: Isoniazid and Rifampicin 
Explanation: 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