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
True about clavulanic acid is ? 
Select and explain. 
A. beta-lactamase inhibitors, B. Extended spectrum penicillin, C. Gram negative bacteria, D. Plasmid inhibitors
A: beta-lactamase inhibitors
Answer: A: beta-lactamase inhibitors 
Explanation: Ans. is 'a' i.e., beta-lactamase inhibitors Clavulanic acid is a beta-lactamase inhibitor. Addition of clavulanic acid re-estabilishes the activity of amoxicillin against beta-lactamase producing organisms.