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
The substance that accumulates in cardiac myxoma is - 
Select and explain. 
A. Mucopolysaccharides, B. Sialomucin, C. Gelatin, D. Glycoprotein
A: Mucopolysaccharides
Answer: A: Mucopolysaccharides 
Explanation: None