# Eruption time of deciduous maxillary second molar is:
A. 18 months
B. 20 months
C. 24 months
D. 28 months
The correct answer is D. 28 months.
The range of time for the crowns of primary dentition to fully erupt is between 7 to 30 months, whereas crown formation of all primary teeth is completed by 12 months of age. The range of time for the crowns of permanent dentition to fully erupt is between 6 to 13 years, (except for third molar).
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