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: Skin
[{'content': 'Herpes resistant to acyclovir is treated by \nSelect and explain. \nA. Foscarnet, B. Lamivudine, C. Ganciclovir, D. Valocyclovir', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. Foscarnet Acyclovir is drug of primary choiceQ for herpes infection and foscarnet is drug of choice for acyclovir resistance HSV, herpes zoster & varicella zoster infectionQ.', 'role': 'assistant'}]