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: Surgery
All electrolyte abnormalities are seen in immediate postoperative period, except: 
Select and explain. 
A. Negative Nitrogen balance, B. Hypokalemia, C. Glucose intolerance, D. Hyponatremia
D: Hyponatremia
Answer: D: Hyponatremia 
Explanation: None