This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
The following ECG findings are seen in Hypokalemia 
Select and explain. 
A. Increased PR interval with ST depression, B. Increased PR interval with peaked T wave, C. Prolonged QT interval with T wave inversion, D. Decreased QT interval with ST depression
A: Increased PR interval with ST depression
Answer: A: Increased PR interval with ST depression 
Explanation: Effects of hypokalaemia on the ECG Changes appear when K+ < 2.7 mmol/l Increased amplitude and width of the P wave Prolongation of the PR interval T wave flattening and inversion ST depression Prominent <a href=" waves</a> (best seen in the precordial leads) Apparent long QT interval due to fusion of the T and U waves Ref Harrison 20th edition pg 1456