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': 'Longest tooth of the maxillary arch is: \nSelect and explain. \nA. Permanent incisor, B. First premolar, C. Permanent canine, D. Deciduous incisor', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]