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': 'The earliest change noticed in hypeensive retinopathy is: \nSelect and explain. \nA. Soft exudate, B. Aeriolar spasm, C. Venospasm, D. Hard exudate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Aeriolar spasm', 'role': 'assistant'}]