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': 'Sirolimus is administered by which route? \nSelect and explain. \nA. Oral, B. Inhalation, C. Intranasal, D. Intravenous', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sirolimus is available only as an oral drug. Its half-life is about 60 hours, while that of everolimus is around 43 hours. Ref: Katzung 11th edition Chapter 61.', 'role': 'assistant'}]