Kashi Nath Dube, sputum positive pulmonary TB patient currently on INH,rifampicin,pyrizinamide and ethambutol is found to be HIV positive.His CD4 count was 100 L and viral load was more than 50,000 copies/ml.Which antiretroviral drug should be avoided:

• A. Lamivudin
• B. Indinavir
• C. Efavirenz
• D. Ritonavir