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 prognosis of rapidly proliferating glomerulonephritis (Crescentric GN) depends upon? 
Select and explain. 
A. Number of crescents, B. Size of crescents, C. Shape of crescents, D. Cellularity of crescents
A: Number of crescents
Answer: A: Number of crescents 
Explanation: Ans. is 'a' i.e., No. of crescents prognosis can be roughly related to the number of crescents; patients with crescents in less than 80% of the glomeruli have a slightly better prognosis than those with higher percentage of crescents"