This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Angiography, Subject name: Radiology
[{'content': 'Fluorescin angiography is used to examine- \nSelect and explain. \nA. Ciliary vasculature, B. Retinal vasculature, C. Corneal vasculature, D. Conjuctival vasculature', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Fluorescin angiography used to examine: Retinal vasculature in DM retinopathy patients for neovascularization. Normal retinal vasculature on flouroscein angiography.', 'role': 'assistant'}]