If in an R-L-C series circuit the current lags the applied voltage by $$60^\circ$$ then

A

$$ X_{L}-X_{C}=\frac{R}{\sqrt{3}}$$

B

$$ X_{L}-X_{C}={\sqrt{3}R}$$

C

$$ X_{L}=X_{C}=R$$

D

$$ X_{L}-X_{C}=R$$