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
It is considered as the bluntly rounded portion of the heart 
Select and explain. 
A. Aorta, B. Apex, C. Base, D. Pericardium
B: Apex
Answer: B: Apex 
Explanation: B: The blunt, rounded point of the heart is the apex.
A: The aorta is the largest artery that carries blood from the left ventricle to the body.
C: The larger, flat portion at the opposite is the base.
D. The pericardium is also called the pericardial sac. It has a fibrous outer layer and a thin inner layer that surrounds the heart.