If $A \times B = \{(p, q), (p, r), (m, q), (m, r)\}$,find $A$ and $B$.

  • A
    $A = \{p, m\}, B = \{q, r\}$
  • B
    $A = \{p, q\}, B = \{m, r\}$
  • C
    $A = \{q, r\}, B = \{p, m\}$
  • D
    $A = \{p, r\}, B = \{m, q\}$

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