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: ENT
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: None