The following are multiple choice questions (with answers) about medical knowledge.   **Question:** 2 root canals are found in what percentage of Mandibular incisors   (A) 22-40%   (B) 11-22%   (C) 20-50 %   (D) 5-15%
['(A) 22-40% <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 22-40% \n (B) 11-22% \n (C) 20-50 % \n (D) 5-15% <> possible answers', '  2 root canals are found in what percentage of Mandibular incisors <> context@']