input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The procedure preferred for periodontal surgery in mandibular anterior teeth is   (A) Gingivectomy   (B) Periodontal flap   (C) Subgingival curettage   (D) Grafting
output: ['(B) Periodontal flap <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Gingivectomy  (B) Periodontal flap  (C) Subgingival curettage  (D) Grafting <> possible answers', '  The procedure preferred for periodontal surgery in mandibular anterior teeth is <> context']