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: Pharmacology
Drug that do not increase QT interval: 
Select and explain. 
A. Amiodarone, B. Quinidine, C. Digitalis, D. Amitryptyline
C: Digitalis
Answer: C: Digitalis 
Explanation: Ans is 'c' i.e. Digitalis o Digitals causes shoening of QT intervalo Other drugs (given in options) cause prolongation of QT interval.