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: Pediatrics
[{'content': 'First teeth to erupt is - \nSelect and explain. \nA. First molar, B. Premolar, C. Incisor, D. Cannine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Permanent teeth\n\n1st molar = 6-7 years\nCentral and lateral incisor = 6-8 years\nCannine and premolar = 9-12 years\n2nd molars = 12 years\nThird molars = 18 years and later\n\nDeciduous teeth', 'role': 'assistant'}]