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
Extended activity of beta lactamases inactivate: 
Select and explain. 
A. Cephalosporins-III generation, B. Macrolides, C. Quinolones, D. Quinolones
A: Cephalosporins-III generation
Answer: A: Cephalosporins-III generation 
Explanation: Cephalosporins-III generation