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
[{'content': 'On the administration of LA in the area of infection, most of the LA is present in the form of: \nSelect and explain. \nA. Increase in cationic form, B. Buffering capacity of LA decreased, C. Decreased concentration of uncharged base, D. Decreased charged cations', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]