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
[{'content': 'In type II RTA (Renal tubular acidosis) serum postassium level is - \nSelect and explain. \nA. Low, B. Normal, C. 5.7 mEq, D. >7 mEq', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]