यदि $\varphi (x) = \int_{1/x}^{\sqrt{x}} \sin(t^2) \, dt$ है,तो $\varphi'(1) = $

  • A
    $\sin 1$
  • B
    $2 \sin 1$
  • C
    $\frac{3}{2} \sin 1$
  • D
    इनमें से कोई नहीं

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