Each of the Following Is True of the Maxillary Sinus

Each of the following is true of the maxillary sinus EXCEPT one. Which is the EXCEPTION?

A) The maxillary sinuses are the largest of the paranasal sinuses.
B) The maxillary sinuses open into the posterior end of the hiatus semilunaris through one or more openings.
C) The superior border of the maxillary sinus is the floor of the orbit.
D) The maxillary sinus is one anatomic structure that almost never varies among individuals.
E) During a nasal infection swelling occurs in the nasal mucosa.