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': 'RC-prep is a combination of? \nSelect and explain. \nA. EDTA with carbamide peroxide, B. EDTA with hydrogen peroxide, C. EDTA with sodium hypochlorite, D. EDTA with urea peroxide and glycol based Glyde', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]