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': 'First retinal abnormality in diabetic retinopathy: \nSelect and explain. \nA. Microaneurysm, B. Hard exudates, C. Soft exudates, D. Cotton wool spots', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Microaneurysm', 'role': 'assistant'}]