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
[{'content': 'More than 90% of this drug is excreted in the urine in intact form. Because its urinary solubility is low, patients should be well hydrated to prevent nephrotoxicity. The drug is : \nSelect and explain. \nA. Indinavir, B. Zidovudine, C. Acyclovir, D. Amantadine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]