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
Crescents are derived from 
Select and explain. 
A. Mesangium + fibrin + macrophage, B. Visceral epithelial cells + fibrin + macrophage, C. Parietal epithelial cells + fibrin + macrophages, D. Tubular epithelium + fibrin + macrophages
C: Parietal epithelial cells + fibrin + macrophages
Answer: C: Parietal epithelial cells + fibrin + macrophages 
Explanation: Crescents are feature of RPGN.
They are made up of parietal epithelial cells,
fibrin and monocytcs / Macrophages.