Dental Which of the following is true about master apical file? A The last file which is selected for the obturation B The initial file which is selected for initial radiographic working length C The smaller file used in between the other file during biomechanical preparation D The last file which is used for removal of soft debris from root canal 💡 Explanation Which of the following is true about master apical file? ✓ Correct Answer: A. The last file which is selected for the obturation