$2\sqrt{3} - \sqrt{7}$ का परिमेयकारी गुणक (rationalising factor) क्या है?

  • A
    $\sqrt{3} + \sqrt{7}$
  • B
    $2\sqrt{3} + \sqrt{7}$
  • C
    $\sqrt{3} + 2\sqrt{7}$
  • D
    इनमें से कोई नहीं

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