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': 'A 60 year old woman presents after 4 days of cataract surgery with history of pain and decrease in vision after an initial Improvement. Diagnosis is \nSelect and explain. \nA. After cataract, B. Endophthalmitis, C. Iris prolapse, D. posterior capsular rupture', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bacterial endophthalmitis is most dreaded complication\xa0over all.\nPain, diminition of vision after improvement s/o endopthalmitis.', 'role': 'assistant'}]