This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
Proximal renal tubular acidosis has all the following features except 
Select and explain. 
A. Hypokalemia, B. Bicarbonate wasting, C. Nephrocalcinosis, D. Hyperchloremia
C: Nephrocalcinosis
Answer: C: Nephrocalcinosis 
Explanation: Nephrocalcinosis usually occurs in distal renal tubular acidosis