This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
In type II RTA (Renal tubular acidosis) serum postassium level is - 
Select and explain. 
A. Low, B. Normal, C. 5.7 mEq, D. >7 mEq
A: Low
Answer: A: Low 
Explanation: None