The instantaneous voltage and current across a load is given by $$v = 50 \sin (314 t - \frac{\pi}{6})$$ volts and $$i = 10 \sin (314 t - \frac{\pi}{2})$$ amperes, respectively. The active power consumed by the load is:

A

500 watts

B

125 watts

C

1000 watts

D

None of these