Which of the following relations is correct with respect to the first $(I)$ and second $(II)$ ionization potentials of sodium $(Na)$ and magnesium $(Mg)$?

  • A
    $I_{Mg} = II_{Na}$
  • B
    $I_{Na} > I_{Mg}$
  • C
    $II_{Mg} > II_{Na}$
  • D
    $II_{Na} > II_{Mg}$

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