A uniform electric field exists in x-y plane. The potential of points A(-2 m,2 m),B(-2 m,2 m) and C(2 m, 4 m) are 4 V, 16V and 12 V, respectively. The electric field is

• A

  $(4\hat{\mathrm{i}}+5\hat{\mathrm{j}})\frac{\mathrm{V}}{\mathrm{m}}$

• B

  $(3\hat{\mathrm{i}}+4\hat{\mathrm{j}})\frac{\mathrm{V}}{\mathrm{m}}$

• C

  $-(3\hat{\mathrm{i}}+4\hat{\mathrm{j}})\frac{\mathrm{V}}{\mathrm{m}}$

• D

  $(3\hat{\mathrm{i}}-4\hat{\mathrm{j}})\frac{\mathrm{V}}{\mathrm{m}}$