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': 'Type III Cu NiTi is used for ? \nSelect and explain. \nA. Patient has low to normal pain threshold, B. Where rapid tooth movement required, C. More force required, D. Patient has good pain threshold', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]