The correct options are
B 4 x 6
C 9 x 4
5 x 3 = 15 which is not an even number. So it is not divisible by 2.
4x 6 = 24 which is an even number. So it is divisible by 2.
9 x 4 = 36 which is an even number. So it is divisible by 2.
7 x 7 = 49 which is not an even number. So it is not divisible by 2.