This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'In MDR TB, Mycobacterium tuberculosis is resistant to: \nSelect and explain. \nA. Isoniazid + Ethambutol, B. Rifampcin + Ethambutol, C. Isoniazid + Rifampcin, D. Isoniazid + Pyrazinamide', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Mycobacterium tuberculosis resistant to Isoniazid + Rifampicin - MDR.TB\nMycobacterium.tuberculosis resistant to Isoniazid, Rifampicin and one of the Fluoroquinolone and any one of the second line drug used in Mycobacterium.tuberculosis - XDR.TB', 'role': 'assistant'}]