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: Anatomy
Sella tursica lies above: 
Select and explain. 
A. Pons, B. Frontal sinus, C. Foramen ovale, D. Sphenoidal sinus
D: Sphenoidal sinus
Answer: D: Sphenoidal sinus 
Explanation: None