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
[{'content': 'Resistance to acyclovir is most commonly due to mutation in a viral gene that encodes a protein that : \nSelect and explain. \nA. Converts viral RNA into DNA, B. Phosphorylates acyclovir, C. Transports acyclovir into the cell, D. Transports acyclovir out of the cell', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]