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': 'With obtura II system which has a high temperature gutta-percha but cools to \nSelect and explain. \nA. 70°C, B. 110°C, C. 130°C, D. 160°C', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]