<prompt> Cause of salt Losing NephropathyInterstitial nephropathyMaintenance phase of acute tubular necrosisPost - Streptococcal GlomerulonephritisIgA nephropathy  <response>: Causes :Reflux Nephropathy.Interstitial nephropathy.Post - obstructive uropathy.Medullary Cystic disease.Recovery phase of ATN. 