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
Longest tooth of the maxillary arch is: 
Select and explain. 
A. Permanent incisor, B. First premolar, C. Permanent canine, D. Deciduous incisor
C: Permanent canine
Answer: C: Permanent canine 
Explanation: None