This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNB 2018, Subject name: Pharmacology
[{'content': 'Drug active against New Delhi beta lactamase producing strains of bacteria is: \nSelect and explain. \nA. Meropenem, B. Colistin, C. Cephalosporins, D. Penicillins', 'role': 'user'}, {'content': 'Answer: B \nExplanation: New Delhi Metallo lactamase bacteria are susceptible to colistin. Penicillinase Resistant Penicillin : Cloxacillin Oxacillin Nafcillin Dicloxacillin Ofloxacillin Methicillin Extended Spectrum b Lactamase bacteria are sensitive to carbapenems.', 'role': 'assistant'}]