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': 'Which of the following has poorest oral bioavailability? \nSelect and explain. \nA. Oseltamiviir, B. Zanamivir, C. Rrimanti dine, D. Amantadine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Zanamivir o Zanamivir has minimum oral bioavailability thus it is given by intranasal or intravenous routes.", 'role': 'assistant'}]