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
Resistance to acyclovir is most commonly due to mutation in a viral gene that encodes a protein that : 
Select and explain. 
A. Converts viral RNA into DNA, B. Phosphorylates acyclovir, C. Transports acyclovir into the cell, D. Transports acyclovir out of the cell
B: Phosphorylates acyclovir
Answer: B: Phosphorylates acyclovir 
Explanation: None