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: Unknown
QT prolongation seen in all of the following conditions except 
Select and explain. 
A. Digitalis toxicity, B. Hypokalemia, C. Hypocalcemia, D. Jervell syndrome
A: Digitalis toxicity
Answer: A: Digitalis toxicity 
Explanation: Short QT interval seen in

Digoxin toxicity
Hypercalcemia.