Discussion
Shovel-shaped incisors are more frequently found among :
Answer: D
Shovel-shaped incisors are most frequently found among the Chinese.
Shovelling is a ridge of enamel along the edges of the lingual surface of the upper incisors, which makes the tooth look like a shovel. It is one of the dental traits used in forensic anthropology to estimate ancestry: it occurs in a large majority of East Asian (Mongoloid) populations, and also among Native Americans, who share that ancestry.
It is uncommon in people of European and African ancestry and only moderately frequent in Australian Aboriginal populations, so those options are less likely than the Chinese.
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