which of the following examination require ureteral catheterization

which of the following examination require ureteral catheterization?

• 1. retrograde pyelogram
• 2. cystourethrogram
• 3.Cystoscopy

• a.  one only
• a. 1 and 2 only
• b. 2 and 3 only
• c. 1,2 and 3 function