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 person is diagnosed to be a diabetic on his 45th bihday. You will recommend a dilated fundoscopic examination: \nSelect and explain. \nA. Immediately, B. Before his 50th bihday, C. When he turns 50 years of age, D. When he complains dimness of vision', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. Immediately', 'role': 'assistant'}]