input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Pure histological landmark for termination of cleaning, shaping and obturation is   (A) CDJ   (B) Apical foramen   (C) Apical constriction   (D) All of the above
output: ['(A) CDJ <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) CDJ  (B) Apical foramen  (C) Apical constriction  (D) All of the above <> possible answers', '  Pure histological landmark for termination of cleaning, shaping and obturation is <> context']