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 are true about cephalosporins, EXCEPT : \nSelect and explain. \nA. Ceftazidime is a 3rd generation cephalosporin., B. Cefoperazone 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: β-lactam antibiotics act by inhibiting cell wall synthesis. These include penicillins, cephalosporins, carbapenems and monobactam.', 'role': 'assistant'}]