The voltage wave $$ v = V_m \sin (\omega t - 15^\circ)$$ volts is mapplied across an AC circuit. If the current leads the voltage by $$ 10^\circ$$ and the maximum value of currents is $$I_m$$ , then the equation of current is

A

$$ i = I_m \sin (\omega t + 5^\circ) amps $$

B

$$ i = I_m \sin (\omega t - 25^\circ) amps $$

C

$$ i = I_m \sin (\omega t + 25^\circ) amps $$

D

$$ i = I_m \sin (\omega t - 5^\circ) amps $$