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
Drug of choice for treatment of infection caused by methicillin resistant Staphylococcus aureus is ? 
Select and explain. 
A. Macrolides, B. Third generation cephalosporins, C. Carbapenems, D. Glycopeptides
D: Glycopeptides
Answer: D: Glycopeptides 
Explanation: Ans. is 'd' i.e., Glycopeptides o Vancomycin is a glycopeptide and is drug of choice for MRSA. Remember, no beta lactam is effective against MRSA.