Which of the following features is found on a primary molar's roots as compared to the roots of a permanent molar?

Question

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Roots of primary teeth are narrower mesiodistally and longer than the crown length.Each crown-to-root ratio of primary teeth is smaller than those ratios of their permanent dentition counterparts.Molar roots flare more as they approach the apex and the apical foramina may be larger,with the accessory canals often larger and more numerous.

Which of the Following Features Is Found on a Primary