The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Apical foramen is found at root apex in   (A) 17-46% of cases   (B) 5-10 % of cases   (C) 10-30% of cases   (D) 100% of cases
['(A) 17-46% of cases <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 17-46% of cases \n (B) 5-10 % of cases \n (C) 10-30% of cases \n (D) 100% of cases <> possible answers', '  Apical foramen is found at root apex in <> context@']