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 "Crescent forming" GlomeruloaEUR' nephritis is: 
Select and explain. 
A. RPGN, B. Acute GN, C. Membranous GN, D. Membrano proliferative GN
A: RPGN
Answer: A: RPGN 
Explanation: RPGN