A simple pendulum has a bob with mass $$m$$ and charge $$q$$. The pendulum string has negligible mass. When a uniform and horizontal electric field it is applied, the tension in the string changes. The final tension in the string, when pendulum attains an equilibrium position is ______.
($$g$$: acceleration due to gravity)

A

$$\sqrt{m^{2}g^{2}+q^{2}E^{2}}$$

B

$$mg-qE$$

C

$$\sqrt{m^{2}g^{2}-q^{2}E^{2}}$$

D

$$mg+qE$$