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: Forensic Medicine
Which tooth is first to erupt in lower jaw is? 
Select and explain. 
A. Central incisor, B. Lateral incisor, C. Canine, D. Molar
A: Central incisor
Answer: A: Central incisor 
Explanation: Ans. is 'a' i.e., Central incisor First temporary tooth to appear (in primary dentition) is lower central incisors and last temporary tooth to erupt is 2nd molar.The sequence of eruption is lower central incisor > upper central incisor > upper lateral incisor > lower lateral incisor > 1st molar > Canine > 2nd molar.Therefore eurption of temporary teeth is completed by eruption of 2nd molar at 25 months (2 years).