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 "Postmoem fibrinous clot in the hea are called cardiac polyp". -Moral thrombus in the right/left atrium of the hea at the time of postmoem examination appears as pedunculated mass attached to the wall of the hea and main mass in the lumen of the cavity