Two charges of $4\mathrm{\mu C}$ each are placed at the corners A and B of an equilateral triangle of side length 0.2 m in air. The electric potential at C is $\left[\frac{1}{4{\mathrm{\pi \epsilon }}_0}=9\times {10}^9\frac{\mathrm{N}\text{-}{\mathrm{m}}^2}{{\mathrm{C}}^2}\right]$

• A

  $9\times {10}^4\mathrm{V}$

• B

  $18\times {10}^4\mathrm{V}$

• C

  $36\times {10}^4\mathrm{V}$

• D

  $36\times {10}^{-4}\mathrm{V}$