This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuro Ophthalmology, Subject name: Ophthalmology
[{'content': 'All of the following take pa in blood supply of Optic Chiasm except : \nSelect and explain. \nA. Anterior cerebral aery, B. Middle cerebral aery, C. Anterior communicating aery, D. Internal carotid aery', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Blood supply of optic chiasm Aerial supply Superior Aspect -Anterior Cerebral & Anterior Communicating aery. Inferior aspect - Internal carotid aery Posterior Communicating aery Anterior Superior Hypophyseal aery Venous Supply- Superior Aspect- Superior Chiasmal vein drains into Anterior Cerebral veins Inferior Aspect - Pre- infundibular vein Draining into Basilar vein Circulus aeriosus (circle of Willis) Large aerial anastomosis that unites the internal carotid and veebrobasilar systems. Lies in the subarachnoid space within the basal cisterns that surround the optic chiasma and infundibulum Blood supply of Optic Chiasma', 'role': 'assistant'}]