A Charge of 10 $\mu$ C Is Placed on a Corner of a Cube

A charge of 10.0 $\mu$ C is placed on a corner of a cube. The flux through one of the sides opposite to the corner where the charge is placed is

A) 1.0 $\times$ 10⁴ N.m²/C.
B) 2.3 $\times$ 10⁴ N.m²/C.
C) 4.7 $\times$ 10⁴ N.m²/C.
D) 5.5 $\times$ 10⁴ N.m²/C.