This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Area that lies immediately lateral to the anterior perforating substance is 
Select and explain. 
A. Orbital gyrus, B. Uncus, C. Optic chiasma, D. Limen insulae
D: Limen insulae
Answer: D: Limen insulae 
Explanation: The limen insulae is the Antero-inferiorly located insular coical surface which conjoins the inferior insular point, the anterior perforated surface, and the temporo mesial surface.