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': 'About lidocaine, all are true except – \nSelect and explain. \nA. LA effect, B. Cardiac arrhythmia, C. Ester, D. Acts on mucous membranes', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lidocaine is an amide local anesthetic with antiarrhythmic effect.\nLidocaine can be used as topical anaesthetic on mucous membrane or skin.', 'role': 'assistant'}]