This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiac Tumors, Subject name: Pathology
[{'content': 'Most common benign hea tumor is: \nSelect and explain. \nA. Rhabdomyoma, B. Hemangioma, C. Lipoma, D. Myxoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Myxomas are the most common primary tumor of the hea in adults. They are benign in nature. 90% are located in the atria, with a left-to-right ratio of approximately 4:1 (atrial myxomas). The tumors are almost always single. Favored site of origin : fossa ovalis in the atrial septum Histopathology of Myxoma: - LEPIDIC CELLS - seen in presence of MYXOID MATRIX.', 'role': 'assistant'}]