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': 'The diameter of labial bow of the maxillary plate \nSelect and explain. \nA. 0.5 - 0.6 mm, B. 0.6 - 0.8 mm, C. 0.7 - 0.8 mm, D. 0.8 - 1.0 mm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]