This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'Drugs least effective against MRSA \nSelect and explain. \nA. Teicoplanin, B. Meropenem, C. Quinupristin, D. Linezolid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Drugs effective against MRSA are SS Cotrimoxazole, SS Ceain cephalosporins, SS Vancomycin, SS Teicoplanin, SS Dalfopris n, SS Quinupris n SSLinezolid.', 'role': 'assistant'}]