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
Esthetically good and strong bonding is shown by: 
Select and explain. 
A. CFR, B. GFR, C. PFR, D. All of the above.
C: PFR
Answer: C: PFR 
Explanation: None