Which of the following correctly distinguishes deciduous teeth from permanent teeth?

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The buccal surfaces of permanent molars are less curved.Permanent molars have more prominent cervical ridges.Deciduous teeth have relatively larger root trunks compared to their total root length.Deciduous incisors have crowns that are broader mesiodistally than their cervico-incisal height.

Explanation

Deciduous incisors differ from permanent ones in that their crowns are wider from mesial to distal than they are tall from the cervical margin to the incisal edge. Other differences include the shape of buccal surfaces, prominence of cervical ridges, and proportions of root trunks.