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: Ophthalmology
[{'content': 'Amaurosis fugax refers to occlusion of: \nSelect and explain. \nA. Middle cerebral aery, B. Branch retinal vein, C. Branch retinal aery, D. Choridal aery', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Branch retinal aery', 'role': 'assistant'}]