This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
MDR/XDR treatment given for 
Select and explain. 
A. 6 months, B. 12 months, C. 18 months, D. 24 months
D: 24 months
Answer: D: 24 months 
Explanation: As Guidelines on Programmatic Management of Drug Resistant TB (PMDT) in IndiaRegimen for MDR-TB This regimen comprises of 6 drugs - Kanamycin, Levofloxacin, Ethionamide, Pyrazinamide, Ethambutol and Cycloserine during 6-9 months of the Intensive Phase and 4 drugs Levofloxacin, Ethionamide, Ethambutol and Cycloserine during the 18 months of the Continuation Phase.Regimen for XDR TBThe Intensive Phase (6-12 months) will consist of 7 drugs - Capreomycin (Cm), Para-aminosalicylic acid (PAS), Moxifloxacin (Mfx), High dose-INH, Clofazimine, Linezolid, and Amoxyclav The Continuation Phase (18 months) will consist of 6 drugs - PAS, Moxifloxacin (Mfx), High dose-INH, Clofazimine, Linezolid, and Amoxyclav