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
At what time is the crown completed for the tooth indicated? 
Select and explain. 
A. Primary maxillary central incisor, 3 weeks., B. Permanent maxillary central incisor, 2 to 3 years., C. Primary maxillary lateral incisor, 2 to 3 months., D. Permanent maxillary lateral incisor, 2 to 3 years.
C: Primary maxillary lateral incisor, 2 to 3 months.
Answer: C: Primary maxillary lateral incisor, 2 to 3 months. 
Explanation: The correct answer for A would be about 1.5 months or 6 weeks; B, About 4 to 5 years; C, About 2.5 months or 10 weeks; D, About 4 to 5 years.