यदि $[\cdot]$ महत्तम पूर्णांक फलन को दर्शाता है, तो $\int_1^2 [x^2] dx =$

  • A
    $5-\sqrt{2}-\sqrt{3}$
  • B
    $5+\sqrt{2}-\sqrt{3}$
  • C
    $5-\sqrt{2}+\sqrt{3}$
  • D
    $5+\sqrt{2}+\sqrt{3}$

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