Medicine MDR tuberculosis is defined when M. tuberculosis shows resistance to – A Isoniazid + Rifampicin B Isoniazid + Pyrazinamide C Rifampicin + Pyrazinamide D Rifampicin + Ethambutol 💡 Explanation MDR tuberculosis is defined when M. tuberculosis shows resistance to - ✓ Correct Answer: A. Isoniazid + Rifampicin