यदि $x=\sqrt{2^{\operatorname{cosec}^{-1} t}}$ और $y=\sqrt{2^{\sec ^{-1} t}}, |t| \geq 1$ है,तो $\frac{d y}{d x}=$

  • A
    $\frac{x}{y}$
  • B
    $\frac{y}{x}$
  • C
    $-\frac{y}{x}$
  • D
    $-\frac{x}{y}$

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