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': 'All true about cephalosporins EXCEPT: \nSelect and explain. \nA. Ceftazimide is a 3rd generation cephalosporin, B. Cefoperzone has got antipseudomonal effect., C. Cefoxitin has got no activity against anaerobes, D. Cephalosporins act by inhibiting cell wall synthesis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: This 2nd generation cephalosporin was developed subsequent to the first generation compounds and are more active against gram-negative organisms, anaerobes, but none inhibits P. aeruginosa ESSENTISLS OF MEDICAL PHARMACOLOGY', 'role': 'assistant'}]