Two finite sets have $m$ and $n$ elements respectively. If the number of subsets of the first set is $56$ more than the number of subsets of the second set,then the values of $m$ and $n$ are:

  • A
    $7, 6$
  • B
    $6, 3$
  • C
    $5, 1$
  • D
    $8, 7$

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