input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** If periodontal surgery is necessary in case of horizontal bone toss in upper anterior region. Which of the following procedure is the most appropriate?   (A) Papilla preservation flap   (B) Widman flap   (C) Coronally displaced flap   (D) Gingivectomy
output: ['(A) Papilla preservation flap <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Papilla preservation flap  (B) Widman flap  (C) Coronally displaced flap  (D) Gingivectomy <> possible answers', '  If periodontal surgery is necessary in case of horizontal bone toss in upper anterior region. Which of the following procedure is the most appropriate? <> context']