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': 'Restorative material which decreases the tensile strength and fracture toughness of dentin, when used during RCT: \nSelect and explain. \nA. Calcium hydroxide., B. EDTA., C. Sodium hypochlorite., D. All of the above.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]