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
Prolonged QT interval is not seen in? 
Select and explain. 
A. Hypokalemia, B. Hypocalcemia, C. Hypomagnesemia, D. Hypercalcemia
D: Hypercalcemia
Answer: D: Hypercalcemia 
Explanation: Hypercalcemia: The most common ECG findings of hypercalcemia are a sho QT interval secondary to a shoened ST segment. There may also be a widened or flattened T wave; however, significant hypercalcemia can cause ECG changes that mimic an acute myocardial infarction Ref Harrison 20th edition pg 1534