The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 37-year-old woman with an HIV infection comes to the physician for a follow-up examination. Six months ago, combined antiretroviral therapy consisting of dolutegravir, tenofovir, and emtricitabine was initiated. Laboratory studies show a decrease in the CD4 count and an increase in the viral load despite ongoing treatment. The patient is switched to a new treatment regimen, including a drug that acts by preventing viral DNA synthesis without undergoing intracellular phosphorylation. Which of the following is the most likely drug?   (A) Efavirenz   (B) Ritonavir   (C) Raltegravir   (D) Lamivudine "
['(A) Efavirenz <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Efavirenz \n (B) Ritonavir \n (C) Raltegravir \n (D) Lamivudine\n" <> possible answers', '  A 37-year-old woman with an HIV infection comes to the physician for a follow-up examination. Six months ago, combined antiretroviral therapy consisting of dolutegravir, tenofovir, and emtricitabine was initiated. Laboratory studies show a decrease in the CD4 count and an increase in the viral load despite ongoing treatment. The patient is switched to a new treatment regimen, including a drug that acts by preventing viral DNA synthesis without undergoing intracellular phosphorylation. Which of the following is the most likely drug? <> context@']