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
The orbital opening is somewhat 
Select and explain. 
A. Quadrangular, B. Oval, C. Oblong, D. Circular
A: Quadrangular
Answer: A: Quadrangular 
Explanation: The orbit appears as quadrangular pyramid in shape, i.e. Resembles a four-sided pyramid, which has an apex, base, four walls - roof, floor, medial and lateral walls.