In an RLC Series Circuit, Which Is Connected to a Source

Multiple Choice

In an RLC series circuit, which is connected to a source of emf _mcos( $\omega$ t) , the current lags the voltage by 45 $\degree$ if:

A) "R = 1/ $\omega$ C - $\omega$ L"
B) "R = 1/ $\omega$ L - $\omega$ C"
C) "R = $\omega$ L - 1/ $\omega$ C"
D) "R = $\omega$ C - 1/ $\omega$ L"
E) " $\omega$ L = 1/ $\omega$ C"