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
True statement regarding Atrioventricular block with atrial tachycardia is - 
Select and explain. 
A. Seen in WPW syndrome, B. Is a complication of pacemaker, C. Can occur in normal person occasionally., D. Seen in Digitalis toxicity with K+ depletion
D: Seen in Digitalis toxicity with K+ depletion
Answer: D: Seen in Digitalis toxicity with K+ depletion 
Explanation: None