For a series $LCR$ circuit,$R = X_L = 2X_C$. The impedance of the circuit and the phase difference between $V$ and $I$ respectively will be:

  • A
    $\frac{\sqrt{5} R}{2}, \tan^{-1}(2)$
  • B
    $\frac{\sqrt{5} R}{2}, \tan^{-1}(1/2)$
  • C
    $\sqrt{5} X_C, \tan^{-1}(2)$
  • D
    $\sqrt{5} R, \tan^{-1}(1/2)$

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