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': 'Multidrug resistance in TB is defined as resistance to \nSelect and explain. \nA. Streptomycin, Rifampicin and Isoniazid, B. Isoniazid and Rifampicin, C. Streptomycin and Rifampicin, D. Streptomycin and Isoniazid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Multidrug Resistant TB (MDR-TB): Resistance to Isoniazid and Rifampicin “with or without resistance to other drugs‘\n\nTreatment of MDR-TB must be done on the basis of sensitivity testing\nDirectly observed therapy certainly helps to improve outcomes and should be considered an integral part of the treatment of MDR-TB.\n\nExtensive Drug Resistant TB (XDR–TB): Resistance to rifampicin and isoniazid as well as to any member of the quinolone family and at least one of the following second-line TB.\nTB treatments: kanamycin, capreomycin, or amikacin.', 'role': 'assistant'}]