Sphenoid sinus drains into which of the following
The right and left sphenoidal air sinuses lie within the body of sphenoid bone. They are separated by a septum. The two sinuses are usually unequal in size Each sinus opens into the sphenomandibular recess of corresponding half of the nasal cavity. Ref BDC volme3,6th edition pg 246
Spheno-ethmoidal recess
Middle meatus
Superior meatus
Hiatus semilunaris
Head and neck