This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Disorders affecting Glomerulus, Subject name: Pathology
What are the urinary albumin levels in microalbuminuria ? 
Select and explain. 
A. 8-10 mg/day, B. 30-300 mg/day, C. 100-150 mg/day, D. 301-600 mg/day
B: 30-300 mg/day
Answer: B: 30-300 mg/day 
Explanation: The normal mean albumin excretion rate (AER) is 8-10 mg/day,. AER of >30 mg/day is considered as abnormal. AER between 30 to 300 mg/day is called as Microalbuminuria . It is a hallmark of early diabetic nephropathy. Levels greater than 300 mg/day are called as macroalbuminuria . Nowdays term microalbuminuria and macroalbuminuria are replaced by moderately and severely increased albuminuria.