This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Medicine
[{'content': 'Figure below is an x-ray of an asymptomatic 64-year-old male executive coming in for his regular annual medical checkup. He had an anterior Q wave MI 4 years ago. What is your diagnosis? \nSelect and explain. \nA. calcific pericarditis, B. left ventricular aneurysm, C. hydatid cyst, D. pleuropericarditis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Note the abnormal humped contour of the left ventricular border, with a curvilinear calcification following the abnormal cardiac contour. The presence of calcification in the ventricular wall and the abnormal left ventricular contour alerts one to the consideration of a ventricular aneurysm.', 'role': 'assistant'}]