The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Brushing technique for gingival recession   (A) Bass   (B) Stillman   (C) Charter   (D) Modified stillman
['(D) Modified stillman <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Bass \n (B) Stillman \n (C) Charter \n (D) Modified stillman <> possible answers', '  Brushing technique for gingival recession <> context@']