Write down the power set of $A = \{8, 9\}$.

  • A
    $\{\phi, \{8\}, \{9\}, \{8, 9\}\}$
  • B
    $\{\phi, \{8\}, \{9\}\}$
  • C
    $\{\phi, \{8\}, \{9\}, \{8, 9\}\}$
  • D
    None of these

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