Sphenoidal sinus drains into ?
Ans. is 'd' i.e., Sphenoethmoidal recess Pa of lateral nasal wall Openings Inferior Nasolacrimal duct Middle Frontal sinus, Maxillary sinus, Anterior ethmoidal sinus Superior Posterior ethmoidal sinus Sphenoethmoidal recess Sphenoid sinus
Superior meatus
Inferior meatus
Middle meatus
Sphenoethmoidal recess