solutions above seem too complicated.
1) x=4k+3 Create a table
k=1,2,3,4
x=7,11,15,19
Don't have info on X => Insufficient
2) y=4k+2
Create a table K=1,2,3,4
Y=6,10,14,18
Don't have info on Y => Insufficient
Together:
Create another table picking X and Y
XY = 42, 110, etc...
Divide XY by 4.
42/4 r=2
110/4 r=2
I stop here.
Answer is C