input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Custom tray is better than stock tray for impression of crown due to following reasons except:   (A) Custom tray is easy to adapt   (B) Stock tray may not record full flange   (C) Custom tray is cheaper   (D) Stock tray can distort easily
output: ['(C) Custom tray is cheaper <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Custom tray is easy to adapt  (B) Stock tray may not record full flange  (C) Custom tray is cheaper  (D) Stock tray can distort easily <> possible answers', '  Custom tray is better than stock tray for impression of crown due to following reasons except: <> context']