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
Isosthenuria is seen in 
Select and explain. 
A. Chronic renal failure, B. Diabetes insipidus, C. Congestive cardiac failure, D. Weil's disease
A: Chronic renal failure
Answer: A: Chronic renal failure 
Explanation: Causes :
Chronic renal failure.
Administration of furosomide.
Hypercalcemia.