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
Paranasal sinus which can be visualized best on a occipito-frontal view is: September 2009 
Select and explain. 
A. Frontal sinus, B. Ethmoidal sinus, C. Sphenoid sinus, D. Maxillary sinus
A: Frontal sinus
Answer: A: Frontal sinus 
Explanation: Ans. A: Frontal Sinus Caldwell-Luc/ occipito-frontal view shows: Frontal sinus (Best visualization) Superior orbital fissure Superior marginof orbit and lamina papyracea Foramen rotundum Maxillary and ethmoid sinus