A charge Q is placed at P(0, 0, a). The coordinates of A and C of a square are $\left(0, \frac{a}{2}, 0\right)$ and (a, a, 0) respectively. The flux through ABCD is

$\frac{Q}{16 \varepsilon_o}$ $\frac{Q}{24 \varepsilon_o}$ $\frac{Q}{48 \varepsilon_o}$ none of these

none of these

Flux through ABCD < flux through OBCE = $\frac{Q}{24 \varepsilon_0}$