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': 'Bioavailability of Ramelteon is ? \nSelect and explain. \nA. 2%, B. 7%, C. 10%, D. 30%', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 2% o The mean systemic availability following an oral dose is less than 2%", 'role': 'assistant'}]