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
What does cardiac polyp means - 
Select and explain. 
A. Acute infarct, B. Cardiac aneurysm, C. Benign tumour, D. Fibrinous clot
D: Fibrinous clot
Answer: D: Fibrinous clot 
Explanation: . Fibrinous clot