This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Microbial, Subject name: Pharmacology
Which is not an antiviral drug: 
Select and explain. 
A. Vidarbine, B. Acyclovir, C. Zidovudine, D. Mitomycin
D: Mitomycin
Answer: D: Mitomycin 
Explanation: dRef: KDT, 5th ed, p. 725, 783, 770 & 4th ed, p. 781