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 are true about cephalosporins, EXCEPT : 
Select and explain. 
A. 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.
C: Cefoxitin has got no activity against anaerobes.
Answer: C: Cefoxitin has got no activity against anaerobes. 
Explanation: β-lactam antibiotics act by inhibiting cell wall synthesis. These include penicillins, cephalosporins, carbapenems and monobactam.