IMAT 2015 Q45 [Atomic Number]

Atoms X and Y form an ionic compound with formula XY_2.

Which option below could give the correct atomic numbers for X and Y?

A. X = 11; Y = 16
B. X = 3; Y = 17
C. X = 12; Y = 9
D. X = 6; Y = 16
E. X = 14; Y = 8