This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anaesthesia, Subject name: Pharmacology
[{'content': 'Local anesthetics: \nSelect and explain. \nA. Block the release of neurotransmitters, B. Blocks the influx of sodium into the cell, C. Increase the release of inhibitory neurotransmitters, D. Inhibit the efflux of sodium from neurons', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (B) Blocks the influx of sodium into the cell(Ref: KDT 8th/e p388, 389)LA block nerve conduction by inhibiting Na+ entry during upstroke of action potential.', 'role': 'assistant'}]