In the Illustration Below,structure "B" is The

Question

In the illustration below,structure "b" is the

A) distal marginal ridge 
B) mesial marginal ridge 
C) lingual fossa 
D) lingual groove

Accepted Answer

Structure "b" in the illustration is the mesial marginal ridge,which forms the mesial shoulder of the lingual surface of an anterior tooth.Structures a,c,and d are the lingual fossa,the lingual groove,and the distal marginal ridge,respectively.