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
Self etching adhesive is the term used for: 
Select and explain. 
A. 4th generation DBA., B. 5th generation DBA., C. 6th generation DBA., D. 7th generation DBA.
D: 7th generation DBA.
Answer: D: 7th generation DBA. 
Explanation: None