This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ECG and Arrhythmias 1, Subject name: Medicine
Complete AV nodal block results in? 
Select and explain. 
A. Progressive increase of PR interval followed by dropped beat, B. More than 3 different morphologies of P waves, C. Absent P waves, D. Unequal PP interval and RR interval
D: Unequal PP interval and RR interval
Answer: D: Unequal PP interval and RR interval 
Explanation: Option A: Progressive increase of PR interval followed by dropped hea beat is ECG feature of Mobitz I Hea Block Option B: More than 3 different morphologies of 'P' wave is feature of Multifocal Atrial Tachycardia. Option C: Pwave is absent in atrial fibrillation. Option D: ECG finding of complete hea block