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: Pathology
Which of the following is the least common site of atherosclerotic lesions - 
Select and explain. 
A. Aortic bifurcation, B. Pulmonary arterial trunk, C. Common carotid artery, D. Middle cerebral artery
B: Pulmonary arterial trunk
Answer: B: Pulmonary arterial trunk 
Explanation: None