A,B,C,D,P and Q are points in a uniform electric field. The potentials of these points are V (A) = 2 volt, V(P) = V(B) = V(D) = 5 volt and V(C) = 8 volt. The electric field at P is :

• A

  $10 {\mathrm{Vm}}^{-1}$ along PQ

• B

  $15\sqrt{2} {\mathrm{Vm}}^{-1}$ along PA

• C

  $5 {\mathrm{Vm}}^{-1}$ along PC

• D

  $5 {\mathrm{Vm}}^{-1}$ along PA