<prompt> Resorbability of the roots of primary dentition is explained byGenetically determinedPressure applied by successorsBoth 1 and 2None  <response>: Resorbability of the roots depends on both the above factors.If there is no successor of primary tooth then it function as a permanent tooth and its root does nor resorb which indicates that its dependency on pressure applied by successor. It also depends on the genetic factors. 