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 defined as resistance to? \nSelect and explain. \nA. INH and Pyrizinamide, B. INH and Rifampicin, C. Rifampicin and Pyrizinamide, D. Resistance to all first line drugs', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., INH and Rifampicin o Multi-Drug Resistant Tuberculosis is defined by resistance to INH and Rifampicin.o 'Multi-Drug Resistant Tuberculosis (MDR-TB) is defined as disease caused by strain of M Tuberculosis that is resistant to both Isoniazid (ONH) and Rifampicin-the most efficacious of the first line Anti-TB drugs ' - Harrison", 'role': 'assistant'}]