This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tuberculosis, Subject name: Social & Preventive Medicine
[{'content': 'XDR means extensive drug resistance to \nSelect and explain. \nA. H+R, B. 1 Fluoroquinolone, C. Minimum of 1 injectable drug, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) All of the aboveRef.: K. Park 23rd ed. /199-200Definition of Extensive Drug Resistance* Resistance to both isoniazid (H) and rifampicin, and* Resistance to 1 fluoroquinolones and* Resistance to one 2nd line injectables out of 3 (kanamycin, amikacin, capreomycin).Older Definition of XDR* Resistance of isoniazid (H) and rifampicin both +* Resistance to any 3rd line drugs.Also Know*Multiple drug resistance (MDR) means resistance to resistance to isoniazid (H) and rifampicin (R).', 'role': 'assistant'}]