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
What is the rostral end of the corpus callosum called? 
Select and explain. 
A. Genu, B. Splenium, C. Body, D. Anterior Horn
A: Genu
Answer: A: Genu 
Explanation: The corpus callosum is a large bundle of myelinated and non-myelinated fibers, the great white commissure that crosses the longitudinal cerebral fissure and interconnects the hemispheres. The body of the corpus callosum is arched; its anterior curved poion, the genu, continues antero ventrally as the rostrum. The thick posterior poion terminates in the curved splenium, which lies over the midbrain. Also Know: The corpus callosum is the largest of the interhemispheric commissures and is largely responsible for co-ordinating the activities of the two cerebral hemispheres.