This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Identification, Subject name: Forensic Medicine
[{'content': 'Which is the first permanent tooth to erupt \nSelect and explain. \nA. 1st Molar, B. Premolar, C. Lateral incisor, D. Central incisor', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Period of eruption of permanent teeth First molar 6-7 years Medial incisors 7-8 years Lateral incisors 8-9 years First premolar 9-10 years Second premolar 10-11 years Canines 11-12 years Second molar 12-14 years Third molar 17-25 years Ref: FORENSIC MEDICINE AND TOXICOLOGY Dr. PC IGNATIUS PAGE NO 70', 'role': 'assistant'}]