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
True about self etched primer is 
Select and explain. 
A. Remove smear layer, B. Does not remove smear layer but binds it to dentin, C. Increase dentin permeability, D. Increase sensitivity
B: Does not remove smear layer but binds it to dentin
Answer: B: Does not remove smear layer but binds it to dentin 
Explanation: None