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 region of myocardium most prone for infarction is: 
Select and explain. 
A. Rt. ventricular epicardial, B. Lft. ventricular epicardial, C. Rt. Ventricular sub endocardial, D. Lft. Ventricular sub endocardial
D: Lft. Ventricular sub endocardial
Answer: D: Lft. Ventricular sub endocardial 
Explanation: None