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': 'In translation, center of rotation is at \nSelect and explain. \nA. Apical 1/3rd, B. Coronal 1/3, C. Infinity, D. Apex', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]