The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Free gingival groove represents   (A) Histologic depth of gingival sulcus   (B) False pocket depth   (C) Depth of gingival sulcus   (D) None of the above
['(A) Histologic depth of gingival sulcus <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Histologic depth of gingival sulcus \n (B) False pocket depth \n (C) Depth of gingival sulcus \n (D) None of the above <> possible answers', '  Free gingival groove represents <> context@']