Pls answer this Q.

3. Two rectangular infinite charged sheet each has surface charge density σ are placed as shown in figure, then magnitude of electric field at point (0, 0, d) d is small, be

(A) $\frac{\sigma }{{{}_{\in }}_0}$

(B) $\frac{\sigma }{2{\in }_0}$

(C) $\frac{\sigma }{4{\in }_0}$

(D) none of these