The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Orthodontically treated midline diastema is best retained by:   (A) Hawley's appliance for 6 months   (B) Hawley's appliance for 12 months   (C) Bonded lingual retainer   (D) No need for retainer as it is self-retained
['(C) Bonded lingual retainer <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', "(A) Hawley's appliance for 6 months \n (B) Hawley's appliance for 12 months \n (C) Bonded lingual retainer \n (D) No need for retainer as it is self-retained <> possible answers", '  Orthodontically treated midline diastema is best retained by: <> context@']