Explanation:
B
The dental formula of an 18 year old man $\underline{2122}$ 2122
2 , incisor 1 , canine, 2 premolar , 2 molars The dental formula of adult human is
$\frac{2123}{2123}$ 2, Incisor, 1, canine, 2, Premolar, 3, molars. This show arrangements of incisor, canines, premolar and molare. on one side of upper and lower jaws.