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: Medicine
Micro albuminuria refers to urinary albumin excretion rate of - 
Select and explain. 
A. 30-300mg/24 hour, B. 400-600 mg/24 hour, C. 700-900 mg/24 hour, D. >1000 mg/24 hour
A: 30-300mg/24 hour
Answer: A: 30-300mg/24 hour 
Explanation: None