The roots of the first permanent molar should be completely formed by the age of

2 explanations

1. 

   rajeev.kumar

   option (2)

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2. 

   Rk96

   First Molar erupts by 6-7 years , root completion is in 1.5-2 years. therefore answer should be 8-9 years which is option (5).

   • 1

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