The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Borders of major connectors adjacent to gingival crevices, should be no closer to the crevice than?   (A) 1-2 mm   (B) 2-3 mm   (C) 3-6 mm   (D) 7-10 mm
['(C) 3-6 mm <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 1-2 mm \n (B) 2-3 mm \n (C) 3-6 mm \n (D) 7-10 mm <> possible answers', '  Borders of major connectors adjacent to gingival crevices, should be no closer to the crevice\nthan? <> context@']