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
[{'content': '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 - \nSelect and explain. \nA. Left main coronary aery, B. Left main coronary aery, C. Circle of Willis, D. Pulmonary aery trunk', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Pulmonary trunk o Atherosclerosis usually involves Abdominal aoa (M.C.), coronary aeries, popliteal aeries, ICA, circle of willis.", 'role': 'assistant'}]