This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diabites & Inappropriate Antidiuretic Hormone, Subject name: Medicine
What is the minimum fluid urine output for neutral solute balance? 
Select and explain. 
A. 300 ml, B. 400 ml, C. 500 ml, D. 750 ml
C: 500 ml
Answer: C: 500 ml 
Explanation: Ans. is 'c' i.e., 500 ml