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: Anaesthesia
[{'content': 'All are true about lidocaine except \nSelect and explain. \nA. It acts on sodium channels in both active and inactive state, B. It is most cardiotoxic local anesthetic, C. It is given IV in cardiac arrhythmias, D. Extensive first pass metabolism', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. It is most cardiotoxic local anesthetic', 'role': 'assistant'}]