Choose the appropriate lettered site or structure in this CT scan of the thorax from a 42-year old man who complains of chest pain and breathing problems. His electrocardiogram shows left ventricular hypertrophy. The left coronary artery arises from which structure?: (A) A, (B) B, (C) C, (D) D
Answer is C. (c) The right and left coronary arteries arise from the ascending aorta