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
The most common cause of sudden arrhythmic 
Select and explain. 
A. Myocardial infarction, B. Aortic stenosis, C. Dilated cardiomyopathy, D. Electrolyte abnormalities
A: Myocardial infarction
Answer: A: Myocardial infarction 
Explanation: None