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
More potent and non toxic drug against herpes virus is 
Select and explain. 
A. Zidovudine, B. Acyclovir, C. Nystatin, D. Amantidine
B: Acyclovir
Answer: B: Acyclovir 
Explanation: None