The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following is the most consistent feature of rapidly progressing glomerulonephritis (RPGN)?   (A) Crescent formation   (B) Mesangial cell proliferation   (C) IgAdeposition   (D) Loss offoot processes
['(A) Crescent formation <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Crescent formation \n (B) Mesangial cell proliferation \n (C) IgAdeposition \n (D) Loss offoot processes <> possible answers', '  Which of the following is the most consistent feature of rapidly progressing glomerulonephritis (RPGN)? <> context@']