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
In a thrombus, the dark lines of zahn are due to 
Select and explain. 
A. Coagulated fibrin, B. Aggregated proteins, C. Aggregated platelets, D. Aggregated R.B.C
D: Aggregated R.B.C
Answer: D: Aggregated R.B.C 
Explanation: None