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: Medicine
[{'content': 'The ketolide which retain activity against streptococcus pneumoniae that are resistant to macrolide is: \nSelect and explain. \nA. Telithromycin, B. Quinupristin, C. Lincomycin, D. Dalfopristin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Telithromycin is useful in the setting of streptococcal pneumonia that is resistant to macrolide Ref: Harrisons, Edition-18, Page : 1138.', 'role': 'assistant'}]