MDR TB must be treated for at least ?

Ans. is 'c' i.e., 20 months Resistance (or intolerance) to H Throughout (6) RZE Resistance (or intolerance) to R Throughout (12-18) HZEQ Resistance to H + R Throughout (at least 20 months) ZEQ + S (for another injectable agents) Resistance to all first-line drugs Throughout (at least 20 months 1 injectable agent + 3 of of these 4 ethionamide cycloserine, Q, PAS Intolerance to Z HRE