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: Pathology
[{'content': 'Most common benign tumor of heart in children \nSelect and explain. \nA. Rhabdomyoma, B. Myxoma, C. Fibroma, D. Lipoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common benign tumor of heart is Rhabdomyoma in children myxoma in adults.', 'role': 'assistant'}]