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
[{'content': 'Properties of local anaesthetic include all the following EXCEPT \nSelect and explain. \nA. Preferentially bind to sodium channels in open and inactivated state., B. Low affinity for channels in resting state., C. They are weak bases, D. Less effective in an environment with low extracellular pH', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]