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
Local anesthetics block nerve conduction by 
Select and explain. 
A. Depolarising the nerve membrane reducing threshold potential, B. Decreasing the membrane permeability to Na+ ions there by stabilizing nerve membrane, C. Increasing the membrane permeability to K+ ions and by depolarising nerve membrane, D. None of the above
B: Decreasing the membrane permeability to Na+ ions there by stabilizing nerve membrane
Answer: B: Decreasing the membrane permeability to Na+ ions there by stabilizing nerve membrane 
Explanation: None