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
All of the following antibacterial agents acts by inhibiting cell wall synthesis, except: 
Select and explain. 
A. Carbapenems, B. Monobactams, C. Cephamycins, D. Nitrofurantation
D: Nitrofurantation
Answer: D: Nitrofurantation 
Explanation: 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.