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 cherry red spot is seen in fundus in \nSelect and explain. \nA. CRV obstruction, B. Diabetic retinopathy, C. Trauma, D. Retinitis pigmentosa', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e.Trauma', 'role': 'assistant'}]