In the coronal section of the head shown below, arrow 2 points to a structure that belongs to which of the following？

In the coronal section of the head shown below, arrow 2 points to a structure that belongs to which of the following？
A.inferior nasal concha
B.maxillary bone
C.ethmoid bone
D.nasal septum
E.vomer bone
正确答案：ethmoid bone