This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
Basal skull view (submentovertical view) X-ray is best to visualize – 
Select and explain. 
A. Ethmoid sinus, B. Frontal sinus, C. Sphenoid sinus, D. Maxillary sinus
C: Sphenoid sinus
Answer: C: Sphenoid sinus 
Explanation: 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)