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
Methicillin resistant Staphylococcus aureus is not expected to respond to - 
Select and explain. 
A. Aminoglycoside, B. Lincosamide, C. Oxazolidinone, D. Carbapenem
D: Carbapenem
Answer: D: Carbapenem 
Explanation: Ans. is 'd' i.e., Carbapenem o MRSA do not respond to any beta lactam antibiotic (penicillins, cephalosporins, carbapenems and monobactams) because it has altered penicillin binding sites.