In the circuit shown below, if the source voltage $V_S = 100\angle 53.13^{\circ}\: V$ then the Theveninâ€™s equivalent

voltage in Volts as seen by the load resistance $R_{L}$ is

- $100\angle 90^{\circ}$
- $800\angle 0^{\circ}$
- $800\angle 90^{\circ}$
- $100\angle 60^{\circ}$