This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ECG and Arrhythmia 3, Subject name: Medicine
True about ECG changes include all except: - 
Select and explain. 
A. Hypokalemia- U wave, B. Hyperkalemia-Tall T waves, C. Hyponatremia- Q waves, D. Hypocalcemia- Prolonged QT interval
C: Hyponatremia- Q waves
Answer: C: Hyponatremia- Q waves 
Explanation: Hypokalemia- prominent U wave Hyperkalemia-tenting of T wave Hypocalcemia-prolonged QT interval