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
[{'content': 'True about self etched primer is \nSelect and explain. \nA. Remove smear layer, B. Does not remove smear layer but binds it to dentin, C. Increase dentin permeability, D. Increase sensitivity', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]