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
In which of the following locations would you least expect to find significant atherosclerotic lesions in a patient with risky factors of smoking, hypertension, diabetes mellitus, and serum cholesterol level of 280 mg/dl - 
Select and explain. 
A. Left main coronary artery, B. Aortic bifurcation, C. Circle of Willis, D. Pulmonary artery trunk
D: Pulmonary artery trunk
Answer: D: Pulmonary artery trunk 
Explanation: None