The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following Is not an etiological agent for gingival recession   (A) Gingival abrasion   (B) Gingival ablation   (C) Gingival inflammation   (D) TFO
['(D) TFO <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Gingival abrasion \n (B) Gingival ablation \n (C) Gingival inflammation \n (D) TFO <> possible answers', '  Which of the following Is not an etiological agent for gingival recession <> context@']