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 one of the following contrast medium is used for IVP? 
Select and explain. 
A. Lipoidil, B. Dianosil, C. Sod. diatrizoate (Hypaque), D. Conray-420
C: Sod. diatrizoate (Hypaque)
Answer: C: Sod. diatrizoate (Hypaque) 
Explanation: Ans. Sod. diatrizoate (Hypaque)