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': 'Thermafil GP is sterilized by: \nSelect and explain. \nA. 5.25%  NaOCl for 1 min. then rinsing with 70% alcohol ., B. 5.25% NaOCl for 30 second only, C. 5.25% NaOCl for 1 min. then rinsed in 50% alcohol., D. 5.25% NaOCl for 1 minute only.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: “The Thermafiil GP carrier is disinfected with 5.25% NaOCl\xa0for 1 minute and then rinsed in 70% alcohol".', 'role': 'assistant'}]