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: Anatomy
Defect in any of the following result in renal agenesis except : 
Select and explain. 
A. Nephrogonic bud, B. Ureteric bud, C. Blartema of nephrogenic tissue, D. Failure of descent of kidney into lumbar region
D: Failure of descent of kidney into lumbar region
Answer: D: Failure of descent of kidney into lumbar region 
Explanation: Kidney arcent from sacral region to lumbar region excreting component derival from metanephric blastema.