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
Which one of the following is the most characteristic arrhythmia with digitalis toxicity ? 
Select and explain. 
A. Atrial fibrillation, B. Extrasystoles, C. NPAT with block, D. Auricular flutter
C: NPAT with block
Answer: C: NPAT with block 
Explanation: None