<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 mgdlLeft main coronary aeryAoic bifurcationCircle of WillisPulmonary aery trunk  <response>: Large elastic aerieseg. Aoa, carotid,and iliac aeriesand 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 