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
RC-prep is a combination of? 
Select and explain. 
A. EDTA with carbamide peroxide, B. EDTA with hydrogen peroxide, C. EDTA with sodium hypochlorite, D. EDTA with urea peroxide and glycol based Glyde
D: EDTA with urea peroxide and glycol based Glyde
Answer: D: EDTA with urea peroxide and glycol based Glyde 
Explanation: None