Opening of nasolacrimal duct is situated in:

Also remember other structures opening in different meatuses.Superior meatus: Posterior ethmoid cellsMiddle meatus: Frontal sinus, maxillary sinus and anterior group of sinusesEthmoid infundibulum: A part of middle meatus, maxillary and sometimes the frontal sinus opens in itInferior meatus: Nasolacrimal ductSphenoethmoid recess: Sphenoid sinus