This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney Stones & Renal Tubular Acidosis, Subject name: Medicine
[{'content': 'R.T.A shows all except: \nSelect and explain. \nA. Urine pH always >5.5, B. Anion gap normal, C. Bicarbonaturia, D. Vitamin D deficiency', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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.', 'role': 'assistant'}]