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': 'Why EDTA and NaOCl can not be combined \nSelect and explain. \nA. EDTA inhibits tissue dissolving property of NaOCl, B. NaOCl inhibits the chelating action of EDTA, C. Both, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]