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 may result in renal agenesis except : 
Select and explain. 
A. Nephrogenic bud, B. Uretericbud, C. Blastema of nephrogenic tissue, D. Blastema of nephrogenic tissue
D: Blastema of nephrogenic tissue
Answer: D: Blastema of nephrogenic tissue 
Explanation: D i.e. Failure of descent of nephrigenic tissue to lumber