The following are multiple choice questions (with answers) about medical knowledge.   **Question:** LA acts on nerve membrane by:   (A) Blocking conductance of Na+ from interior to exterior   (B) Blocking conductance of Na+ from exterior to interior   (C) Blocking conductance of K+ from interior to exterior   (D) Blocking conductance of K+ from exterior to interior
['(B) Blocking conductance of Na+ from exterior to interior <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Blocking conductance of Na+ from interior to exterior \n (B) Blocking conductance of Na+ from exterior to interior \n (C) Blocking conductance of K+ from interior to exterior \n (D) Blocking conductance of K+ from exterior to interior <> possible answers', '  LA acts on nerve membrane by: <> context@']