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: Surgery
On administration of LA in an area of infection, it is not effective because of increase in 
Select and explain. 
A. Cations, B. Free base, C. Uncharged base, D. None
A: Cations
Answer: A: Cations 
Explanation: None