This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: membrane structure and function, Subject name: Biochemistry
Type of collagen forming basement membrane of kidney 
Select and explain. 
A. I, B. II, C. III, D. IV
D: IV
Answer: D: IV 
Explanation: Type IV collagen is abnormal, so basement membrane of kidney glomerular apparatus is abnormal. Hence, hematuria is seen, which will eventually progress to kidney failure.Ref: DM Vasudevan, page no: 583