This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitreous and retina, Subject name: Ophthalmology
[{'content': "Enlarging dot sign in fundus fluorescein scanning is seen in - \nSelect and explain. \nA. Cystoid macular edema, B. Central serous retinopathy, C. Significant macular edema, D. Coat's disease", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Fundus fluorescein angiography helps in confirming the diagnosis. Two patterns are seen: Ink-blot pattern. It consists of small hyperfluorescent spot which gradually increases in size Smoke-stack pattern. It consists of a small hyperfluorescent spot which ascends veically like a smoke-stack and gradually spreads laterally to take a mushroom or umbrella configuration. Ref : AK Khurana 6thE pg 293', 'role': 'assistant'}]