This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Principles of STD Management, Subject name: Gynaecology & Obstetrics
[{'content': 'Drug used in genital herpes infection: \nSelect and explain. \nA. Acyclovir, B. Zidovudine, C. Stavudine, D. Lamivudine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: a (Acyclovir) Ref: Shaw, 13th ed, p. 114; Harrison, 16th ed, p. 1029Treatment of Herpes simplex:EncephalitisKeratitis - TrifluridineNeonatal Genital Acyclovir Primary treatment Recurrent treatment -', 'role': 'assistant'}]