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: Medicine
[{'content': "ACNA is sensitive and specific for: \nSelect and explain. \nA. Post streptococcal glomerulonephritis, B. Idiopathic cresentic glomerulonephritis, C. Diffuse glomerulosclerosis, D. Henoch's schonlein_purpura", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Idiopathic crecentric glomerulonephritis) Crescentric glomerulonephritis is associated with antimyeloperoxidase antibodies. The major target for perinuclear ANCA (p-ANCA) is the enzyme myeloperoxidase', 'role': 'assistant'}]