ENT Congenital Lesions and Stridor c35ca155 Most superior sinus in the face is: A Frontal sinus B Ethmoid sinus C Maxillary sinus D Sphenoid sinus High-Yield Explanation (a) Frontal sinus(Ref. Scott Brown, 6th ed., 4/3/2)Most superior sinus is the frontal sinus followed by ethmoid, sphenoid and maxillary sinuses.