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: Anatomy
[{'content': 'All form right heart border EXCEPT? \nSelect and explain. \nA. Right ventricle, B. IVC, C. Right atrium, D. SVC', 'role': 'user'}, {'content': 'Answer: A \nExplanation: BORDERS OF HEART\n• Right border (slightly convex): formed by the right atrium, SVC, and the IVC.\n• Left border (nearly horizontal): formed by the left ventricle and slightly by the left auricle.\n• Inferior border (oblique, nearly vertical), formed mainly by the right ventricle and slightly by the left ventricle.\n• Superior border: formed by the right and left atria and auricles in an anterior view', 'role': 'assistant'}]