This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Medicine
[{'content': 'All are features of A-type 1 Except \nSelect and explain. \nA. Renal stones, B. Fanconi syndrome, C. No anion gap, D. Decreased potassium', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The typical findings in acquired or inherited forms of classic distal A (type 1 A) include hypokalemia, non-AG metabolic acidosis, low urinary NH4+ excretion (positive UAG, low urine ), and inappropriately high urine pH (pH > 5.5). Most patients have hypocitraturia and hypercalciuria, so nephrolithiasis, nephrocalcinosis, and bone disease are commonReference: Harrison&;s Principles of Internal Medicine; 19th edition; Chapter 66; Acidosis and Alkalosis', 'role': 'assistant'}]