If $y = \sqrt{\sec x + \sqrt{\sec x + \sqrt{\sec x + \dots \infty}}} \,,$ then the value of $\int_{0}^{\pi/3} (2y - 1) \frac{dy}{dx} \, dx$ is equal to $(\sec x > 0)$ -

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    $3$

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