which of the following examination require ureteral catheterization.. cystourethrogram

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