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': 'Set white MTA  can be dissolved by the adjunct solution of: \nSelect and explain. \nA. Carbonic acid., B. Normal saline., C. Sodium hypochlorite., D. Hydrogen peroxide.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Carbonic acid can be effectively used as an adjunct to\xa0dissolve set white MTA even after 21 days.', 'role': 'assistant'}]