Three infinitely long charged sheets are placed as shown in figure. The electric field at point P is

• A

  $\frac{2\mathrm{\sigma }}{{\mathrm{\epsilon }}_{\mathrm{o}}}\widehat{\mathrm{k}}$

• B

  $-\frac{2\mathrm{\sigma }}{{\mathrm{\epsilon }}_{\mathrm{o}}}\widehat{\mathrm{k}}$

• C

  $\frac{4\mathrm{\sigma }}{{\mathrm{\epsilon }}_{\mathrm{o}}}\widehat{\mathrm{k}}$

• D

  $-\frac{4\mathrm{\sigma }}{{\mathrm{\epsilon }}_{\mathrm{o}}}\widehat{\mathrm{k}}$