The correct answer is b) vomer and ethmoid.
The nasal septum is the structure that divides the nasal cavity into two nasal passages. It is primarily composed of two bones: the vomer and the ethmoid. The vomer is a thin, flat bone that forms the lower and posterior part of the septum, while the perpendicular plate of the ethmoid bone contributes to the upper part of the septum.
Other options listed do not contribute to the formation of the nasal septum. For instance, the maxilla and nasal bones primarily form the structure of the face but do not participate in the septum itself. Likewise, the inferior nasal conchae and lacrimal bones have their functions but do not help in forming the nasal septum. Therefore, the combination of the vomer and ethmoid bones is essential for the structural integrity of the nasal septum.