This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
In Ingle's method of Endodontic working length determination, safety allowance is for 
Select and explain. 
A. Possible image distortion or magnification, B. To confirm with apical termination, C. Periapical bone resorption, D. Recording final working length
A: Possible image distortion or magnification
Answer: A: Possible image distortion or magnification 
Explanation: None