This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Medicine
[{'content': 'Multi drug resistant tuberculosis is resistance to? \nSelect and explain. \nA. INH & Pyrizinamide, B. INH & Rifampicin, C. Rifampicin & Pyrizinamide, D. Resistance to all', 'role': 'user'}, {'content': "Answer: B \nExplanation: ANSWER: (B) INH & RifampicinREF: Davidson's 21st edition Chapter no 19 page no 695Repeat Medicine 2013 Session 1MDR TB is defined as resistance to at least rifampicin & isoniazid with or without other drug resistance.Extensively drug resistant TB is defined by resistance to at least rifampicin & isoniazid in addition to any quinolone & at least one injectable second line agent", 'role': 'assistant'}]