input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Vestibuloplasty all are true except:   (A) Mucosal advancement   (B) Use of hydroxyapatite   (C) Secondary epithelialization   (D) Usage of epithelial grafts
output: ['(B) Use of hydroxyapatite <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Mucosal advancement  (B) Use of hydroxyapatite  (C) Secondary epithelialization  (D) Usage of epithelial grafts <> possible answers', '  Vestibuloplasty all are true except: <> context']