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
IgA-nephropathy is seen in: 
Select and explain. 
A. Membranous glomerulonephritis, B. Mesangioproliferative glomerulonephritis, C. Focal glomerulonephritis, D. Cresentic glomerulonephritis
B: Mesangioproliferative glomerulonephritis
Answer: B: Mesangioproliferative glomerulonephritis 
Explanation: Answer is B (Mesangioproliferative glomerulonephritis):