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
[{'content': 'True about ECG changes include all except: - \nSelect and explain. \nA. Hypokalemia- U wave, B. Hyperkalemia-Tall T waves, C. Hyponatremia- Q waves, D. Hypocalcemia- Prolonged QT interval', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hypokalemia- prominent U wave Hyperkalemia-tenting of T wave Hypocalcemia-prolonged QT interval', 'role': 'assistant'}]