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
Clavulanic acid added to ampicillin causes: 
Select and explain. 
A. Increase	effectivity	against	gram-negative organisms, B. Inhibition of β-lactamases, C. Increases the effectiveness against delta lactamase producing organism, D. Increase	effectivity	against	gram-positive organisms
B: Inhibition of β-lactamases
Answer: B: Inhibition of β-lactamases 
Explanation: None