This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
The antiviral drug recommended for treatment of Herpes Zoster infection of Trigeminal nerve
distribution in an immunocompromised host is 
Select and explain. 
A. Fomivirsen, B. Vidarabin, C. Famciclovir, D. Entecavir
C: Famciclovir
Answer: C: Famciclovir 
Explanation: None