<prompt> 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 mgdl -Left main coronary aeryLeft main coronary aeryCircle of WillisPulmonary aery trunk  <response>: Ans. is d i.e., Pulmonary trunk o Atherosclerosis usually involves Abdominal aoa M.C., coronary aeries, popliteal aeries, ICA, circle of willis. 