input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** While performing biomechanical preparation, apical constriction is enlarged to 50 sized  instrument. What would be the next step?   (A) Use reverse filing technique   (B) Reinstrument with larger instrument 1 mm short of previous preparation   (C) Fit a 50 mm cone and condense carefully   (D) Fill with 40 sized cone
output: ['(B) Reinstrument with larger instrument 1 mm short of previous preparation <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Use reverse filing technique  (B) Reinstrument with larger instrument 1 mm short of previous preparation  (C) Fit a 50 mm cone and condense carefully  (D) Fill with 40 sized cone <> possible answers', '  While performing biomechanical preparation, apical constriction is enlarged to 50 sized  instrument. What would be the next step? <> context']