Paranasal sinuses present at bih
Frontal and maxillary
Ethmoid and maxillary
Frontal and ethmoid
Sphenoid and ethmoid
The sinuses are rudimentary or even absent at bih.They enlarge rapidly during the age of 6 to 7 years i.e, at thevtime of eruption of permanent teeth and then after pubey.From bih to adult life, the growth of the sinuses is due to the enlargement of the bones; in old age, it is due to resorption of the surrounding cancellous bone. Ethmoid and maxillary sinuses present at bih Ref BDC volume;3.Sixth edition
Head and neck