Answer:
At superior nasal concha:
opening of sphenoid sinus
Below superior nasal concha:
opening of posterior ethmoidal cells
Below middle concha:
opening of middle ethmoidal cells
opening of frontal sinus
opening of maxillary sinus
opening of inferior ethmoidal cells
Below inferior nasal concha:
opening of nasolacrimal duct
posteriorly is opening of pharyngotympanic tube