Basal skull view (submentovertical view) X-ray is best to visualize –: (A) Ethmoid sinus, (B) Frontal sinus, (C) Sphenoid sinus, (D) Maxillary sinus
Answer is C. Best view for maxillary sinus → Water's view (occipito-mental view)
Best view for frontal sinus     →  Caldwell view (occipito-frontal view)
Best view for sphenoid sinus  →   Basal view (submentovertical view)