This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Medicine
MDRTB must be treated for at least- 
Select and explain. 
A. 12 months, B. 18 months, C. 20 months, D. 36 months
C: 20 months
Answer: C: 20 months 
Explanation: Ans. is 'c' i.e., 20 months Resistance (or intolerance) to HThroughout(6)RZEResistance (or intolerance) to RThroughout (12-18)HZEQResistance to H + RThroughout (at least 20 months)ZEQ + S (for another injectable agents)Resistance to all first-line drugsThroughout (at least 20 months)1 injectable agent + 3 of of these4 ethionamide cycloserine, Q, PASIntolerance to Z2HRE