中国大学MOOC: The medial wall of ethmoid labyrinth has

The medial wall of ethmoid labyrinth has A: superior nasal concha and middle nasal concha B: superior nasal concha and inferior nasal concha C: middle nasal concha and inferior nasal concha D: ethmoid bone E: lacrimal bone

Middle turbinate is A: an independent bone fragment B: part of maxilla C: part of nasal bone D: part of ethmoid bone

What does number 2 indicate in the following picture? [img=624x910]1803a82217935b8.png[/img] A: the nasal bone B: the sphenoid bone C: the vomer D: the nasal septum E: the ethmoid bone