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
The structure marked with arrows is: 
Select and explain. 
A. Empty trabeculae, B. Incisive foramen, C. Incisive canal, D. Midline suture
B: Incisive foramen
Answer: B: Incisive foramen 
Explanation: None