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': 'Features of T wave in ECG of hypokalemia patients are all except: September 2009 \nSelect and explain. \nA. Elevated T wave, B. Inveed T wave, C. Flat T wave, D. Bigeminal T wave', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A: Elevated T wave ECG changes of few impoant conditions: Hypocalcemia- Prolonged ST and QT intervals Hypercalcemia- shoened ST segment - widened T wave Hypokalemia- ST depression - flat or inveed T wave- Prominent U wave Hyperkalemia- Tall, peaked T waves Flat P waves widened QRS complex - Prolonged PR interval Hypomagnesemia- Tall T waves - Depressed ST segment Hypermagnesemia- Prolonged PR interval - widened QRS complexes', 'role': 'assistant'}]