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
Which of the following iatrogenic condition shown in the given IOPA: 
Select and explain. 
A. Ledge., B. Perforation., C. Transportation., D. Zipping.
B: Perforation.
Answer: B: Perforation. 
Explanation: None