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: Pathology
Which of the following medications shortens the recovery period of primary Herpetic gingivostomatitis? 
Select and explain. 
A. Acyclovir, B. Ziduvidine, C. Kenalog in orabase, D. All of the above
A: Acyclovir
Answer: A: Acyclovir 
Explanation: None