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': 'Local anaesthetics act by inhibiting ? \nSelect and explain. \nA. Influx of IC+, B. Efflux of IC+, C. Influx of Na+, D. Efflux of Na+', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Influx of Na+", 'role': 'assistant'}]