If $\cos \theta + \sec \theta = \frac{5}{2}$, then the general value of $\theta $ is

  • A

    $n\pi \pm \frac{\pi }{3}$

  • B

    $2n\pi \pm \frac{\pi }{6}$

  • C

    $n\pi \pm \frac{\pi }{6}$

  • D

    $2n\pi \pm \frac{\pi }{3}$

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