The general value of $\theta$ satisfying $\sin^2 \theta + \sin \theta = 2$ is

  • A
    $n\pi + (-1)^n \frac{\pi}{6}$
  • B
    $2n\pi + \frac{\pi}{4}$
  • C
    $n\pi + (-1)^n \frac{\pi}{2}$
  • D
    $n\pi + (-1)^n \frac{\pi}{3}$

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