1. All of the following alternatives to frontline therapy treatment with daclatasvir/sofosbuvir are contraindicated in a patient with hepatitis C virus genotype 3 infection, EXCEPT:

2. Daclatasvir is contraindicated in combination with:

3. RM is a 58-year-old woman with hepatitis C virus genotype 2 infection who failed first-line treatment with direct-acting antiviral agent-based therapy. Resistance-associated variant testing revealed the presence of a polymorphism associated with resistance to ledipasvir, an NS5A protease inhibitor. Which of the following describes the BEST approach to retreatment?

4. Which of the following BEST describes the investigational 3-drug combination of sofosbuvir/velpatasvir/GS-9857?

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