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': 'Roxithromycin is \nSelect and explain. \nA. A long acting macrolide, B. Short action quinolone, C. Short acting macrolide, D. Long acting polypeptide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]