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
First commissure to develop 
Select and explain. 
A. Corpus callosum, B. Anterior commissure, C. Hippocampus, D. None of the above
B: Anterior commissure
Answer: B: Anterior commissure 
Explanation: The anterior commissure,connecting the archipallia(olfactory bulbs,piriform area and anterior pas of temporal lobes)of the two sides. REF.B D Chaurasia's Human Anatomy vol.3,fifth edition,pg.419