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': 'Most common cause of hyphema due to Blunt trauma \nSelect and explain. \nA. Minor arterial circle, B. Major arterial circle, C. Choroidal veins, D. Conjunctival vessels', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Most common cause of hyphema due to Blunt trauma is Major arterial circle.', 'role': 'assistant'}]