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
[{'content': 'All of the following antibacterial agents acts by inhibiting cell wall synthesis, except: \nSelect and explain. \nA. Carbapenems, B. Monobactams, C. Cephamycins, D. Nitrofurantation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Nitrofurantoin acts by generation of highly reactive intermediates which damage DNA. It does not inhibit cell wall synthesis. Ref: Essentials of Pharmacology by K D Tripathi, 5th Edition, Pages 628, 667; Antibiotic Manual: A Guide to Commonly Used Antimicrobials By David Schlossberg, Rafik Samuel, M.D., 2011, Page 310.', 'role': 'assistant'}]