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
[{'content': 'The "Crescent forming" GlomeruloaEUR\' nephritis is: \nSelect and explain. \nA. RPGN, B. Acute GN, C. Membranous GN, D. Membrano proliferative GN', 'role': 'user'}, {'content': 'Answer: A \nExplanation: RPGN', 'role': 'assistant'}]