This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Sodium and Potassium, Subject name: Pediatrics
In which electrolyte abnormality, the following ECG finding is seen? 
Select and explain. 
A. Hyponatremia, B. Hypernatremia, C. Hypokalemia, D. Hyperkalemia
C: Hypokalemia
Answer: C: Hypokalemia 
Explanation: ECG changes- flattened T wave, a depressed ST segment & appearance of a U wave- seen in Hypokalemia