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: Radiology
Which of following is not a feature of renovascular hypertension on intravenous urography - 
Select and explain. 
A. Delayed 'wash - out' of contrast, B. Filling defect in calyces, C. Ureteral kinking, D. Normal or small sized kidney
B: Filling defect in calyces
Answer: B: Filling defect in calyces 
Explanation: IVU findings of renovascular hypertension are -


Delayed or absent nephrogram
Normal or atrophic kidney without calyceal deformity or abnormality
Ureteral kinking (in retroperitoneal fibrosis)
Rim nephrogram