This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Plain Film Radiography, Fluoroscopy, and Tomosynthesis, Subject name: Radiology
[{'content': 'Fluorescin angiography is used to examine - \nSelect and explain. \nA. Ciliary vasculature, B. Retinal vasculature, C. Comeal vasculature, D. Conjuctival vasculature', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Retinal vasculatureo Fluorescein angiography is a radiological examination of retinal vasculature after the administration of a fluorescein dye.", 'role': 'assistant'}]