This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'The substance that accumulates in cardiac myxoma is \nSelect and explain. \nA. Mucopolysaccharides, B. Sialo mucin, C. Gelatin, D. Glycoprotein', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Myxomas are composed of stellate or globular myxoma (lepidic cell, endothelial cells, smooth muscle cells and undifferentiated cells) embedded within abundant acid mucopolysaccharide substance.', 'role': 'assistant'}]