Dental

Which one of the following morphological characteristic is representative of all posterior maxillary teeth?

Marked mesial concavity on crowns and roots.

Tips of cusps are well within the confines of the root trunks.

From mesial/distal aspect, crowns are rhomboidal in shape.

From mesial/distal aspect, all maxillary posterior crowns are trapezoidal with shortest uneven side toward occlusal surface.