This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal tract, Subject name: Pharmacology
An oral drug approved for the treatment of Hepatitis C? 
Select and explain. 
A. Ledipsavir, B. Rimantidine, C. Telbivudine, D. Entecavir
A: Ledipsavir
Answer: A: Ledipsavir 
Explanation: Ledipsavir is a direct acting antiviral drug used to treat chronic Hep C . It is used in combination with sofosbuvir. trade name being Harvoni Ref: Goodman n Gillman 13th ed.