The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Currently used radiographic method for working length determination is:   (A) Grossman technique   (B) Ingels technique.   (C) Bregman technique.   (D) None of the above.
['(B) Ingels technique. <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Grossman technique \n (B) Ingels technique. \n (C) Bregman technique. \n (D) None of the above. <> possible answers', '  Currently used radiographic method for working length determination is: <> context@']