<prompt> XDR TB is resistance to ?IsoniazidIsoniazid RifampicinIsoniazid Rifampicin EthambutolIsoniazid Rifampicin Kanamycin  <response>: Ans.is d i.e., Isoniazid Rifampicin Kanamycin Treatment of extensive drug resistance XDR TB XDR-TB is defined as resistance to any fluoroquinolone and at least one of the following three second-line drugs capreomycin, kanamycin, amikacin, in addition to multidrug resistance. The Regimen for XDR-TB would be of 24-30 months duration, with 6-12 months Intensive Phase IP and 18 months Continuation Phase CP. Regimen is :- i Intensive phase 6-12 months : Seven drugs : Capreomycin, PAS, moxifloxacin, high dose INH, clofazimine, Linezolid, amoxyclay. ii Continuation phase 18 months : Six drugs : PAS, moxifloxacin, high dose INH, clofazimine, linezolid, amoxyclay. 