This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
[{'content': 'True statement regarding development of drug resistance in MRSA is \nSelect and explain. \nA. Results due to pencillinase enzyme production, B. Occurs due to change in penicillin -binding proteins, C. Chromosome mediated, D. Treated with amoxicillin +clavulanix acid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref Katzung 11/e p776 Methicillin resistance occurs due to altered PBPs6, thus no penicillin (infant no beta lactam antibiotic) is useful against Methicillin -resistant Staphylococcus Audrie infections', 'role': 'assistant'}]