This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pathology
In which of the following locations would you least except to find significant atherosclerotic lesions in a patient with risky factors of smoking, hypeension, diabetes mellitus, and serum cholesterol level of 280 mg/dl 
Select and explain. 
A. Left main coronary aery, B. Aoic bifurcation, C. Circle of Willis, D. Pulmonary aery trunk
D: Pulmonary aery trunk
Answer: D: Pulmonary aery trunk 
Explanation: Large elastic aeries(eg. Aoa, carotid,and iliac aeries)and large and medium muscular aeries (coronary,renal,and popliteal aeries) are the vessels most commonly involved in atherosclerosis Robbins 9 th edition page no. 342