<prompt> R.T.A shows all except:Urine pH always 5.5Anion gap normalBicarbonaturiaVitamin D deficiency  <response>: Renal tubular acidosis- is characterized by damage to tubules ranging from PCT to DCT. In PCT damage , Bicarbonaturia is seen. In DCT damage , inability to acidify urine is seen leading to urine pH 5.5 A causes normal anion gap acidosis. A 1 has calcium loss in urine leading to renal rickets but not nutritional deficiency of vitamin D3. Vitamin D deficiency is seen with Chronic Renal failure. 