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
[{'content': 'Which is not an antiviral drug: \nSelect and explain. \nA. Vidarbine, B. Acyclovir, C. Zidovudine, D. Mitomycin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: dRef: KDT, 5th ed, p. 725, 783, 770 & 4th ed, p. 781', 'role': 'assistant'}]