input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** After Le-Fort 1 osteotomy the blood supply of maxilla is maintained by   (A) Posterior superior alveolar artery   (B) Anterior superior alveolar artery   (C) Greater palatine artery   (D) Ascending palatine branch of facial artery
output: ['(D) Ascending palatine branch of facial artery <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Posterior superior alveolar artery  (B) Anterior superior alveolar artery  (C) Greater palatine artery  (D) Ascending palatine branch of facial artery <> possible answers', '  After Le-Fort 1 osteotomy the blood supply of maxilla is maintained by <> context']