A cube of side \[b\] has a charge \[q\] at each of its vertices. The electric field due to this charge distribution at the centre of this cube will be [KCET 1994, 2000]

• A.                    \[q/{{b}^{2}}\]
• B.                                      \[q/2{{b}^{2}}\]
• C.                    \[32q/{{b}^{2}}\]
• D.                                      Zero