If $\sin \theta + \sin^2 \theta = 1$,then $\cos^2 \theta + \cos^4 \theta$ is equal to

  • A
    $1$
  • B
    $\frac{\sin \theta}{\cos^2 \theta}$
  • C
    $\frac{\cos^2 \theta}{\sin \theta}$
  • D
    None

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