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': "In which of the following conditions Berlin's edema is seen? \nSelect and explain. \nA. Open angle glaucoma, B. After cataract surgery, C. After concussional trauma, D. Diabetic retinopathy", 'role': 'user'}, {'content': 'Answer: C \nExplanation: After concussional trauma', 'role': 'assistant'}]