This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
The most common cause of sudden arrhythmic cardiac death is - 
Select and explain. 
A. Myocardial infarction, B. Aoic stenosis, C. Dilated cardiomyopathy, D. Electrolyte abnormalities
A: Myocardial infarction
Answer: A: Myocardial infarction 
Explanation: most common cause of sudden cardiac deaths are arhymias and acute MI After arrhythmias and cardiogenic shock, the commonest cause of death after acute MI is rupture. Cardiac rupture complicates 10 per cent of acute MIs and occurs in the healing stages at around five to nine days Ref Harrison 20th edition pg 1411