The following are multiple choice questions (with answers) about medical knowledge.   **Question:** What percentage of cases of mandibular incisors have single apical foramen   (A) 97.80%   (B) 82.50%   (C) 60%   (D) 60%- 78%
['(A) 97.80% <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 97.80% \n (B) 82.50% \n (C) 60% \n (D) 60%- 78% <> possible answers', '  What percentage of cases of mandibular incisors have single apical foramen <> context@']