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
Cause of salt Losing Nephropathy 
Select and explain. 
A. Interstitial nephropathy, B. Maintenance phase of acute tubular necrosis, C. Post  - Streptococcal Glomerulonephritis, D. IgA nephropathy
A: Interstitial nephropathy
Answer: A: Interstitial nephropathy 
Explanation: Causes :
Reflux Nephropathy.
Interstitial nephropathy.
Post - obstructive uropathy.
Medullary Cystic disease.
Recovery phase of ATN.