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: Pathology
[{'content': 'Microalbuminuria is defined as protein levels of \nSelect and explain. \nA. 30-300 mg/d, B. 151-200 mg/d, C. 100-150 mg/d, D. 301-600 mg/d', 'role': 'user'}, {'content': 'Answer: A \nExplanation: • The earliest manifestation of diabetic nephropathy is the appearance of low amounts of albumin in the urine (>30 mg/day, but <300 mg/day), that is, microalbuminuria.\n• Microalbuminuria is also a marker for greatly increased cardiovascular morbidity and mortality for persons with either type 1 or type 2 diabetes', 'role': 'assistant'}]