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': 'Flower petal appearance in fundus flourescein angiography is in \nSelect and explain. \nA. Cystoid macular edema, B. Retinitis pigmentosa, C. Central serous retinopathy, D. Age related macular degeneration', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Flower petal appearance\xa0 - CME.\nSmoke stack pattern or Ink blot sign - Central serous retinopathy.', 'role': 'assistant'}]