This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain , Subject name: Anatomy
Pa of neural tube from which corpus callosum develops 
Select and explain. 
A. Lamina terminalis, B. Basal lamina, C. Alar lamina, D. Roof plate
A: Lamina terminalis
Answer: A: Lamina terminalis 
Explanation: Initially, corpus callosum forms a small bundle in the lamina terminalis and later extends first anteriorly and then posteriorly, arching over the thin roof of the diencephalon. It connects the nonolfactory areas of the right and the left cerebral coices. Ref: Gray's39e/p-518