The following are multiple choice questions (with answers) about medical knowledge.   **Question:** If during access opening of a maxillary incisor perforation occurs on labial surface just above CEJ, reason is?   (A) Inability to assess the lingual inclination of crown to root   (B) Inability to assess the facial inclination of crown to root   (C) All of the above   (D) None of the above
['(A) Inability to assess the lingual inclination of crown to root <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Inability to assess the lingual inclination of crown to root \n (B) Inability to assess the facial inclination of crown to root \n (C) All of the above \n (D) None of the above <> possible answers', '  If during access opening of a maxillary incisor perforation occurs on labial surface just above CEJ, reason is? <> context@']