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
Hypercalcemia in ECG is diagnosed by: 
Select and explain. 
A. Increased QT interval, B. Decreased QT interval, C. Increased PR interval, D. Tall T waves
B: Decreased QT interval
Answer: B: Decreased QT interval 
Explanation: Answer is B (Decreased QT interval) Hypercalcemia is characterized by a decreased QT interval.