During the electrolysis of higher concentration of $H_2SO_4$,the product obtained at anode is . . . . . . .

  • A
    $O_{2_{(g)}}$
  • B
    $H_2S_2O_{8_{(aq)}}$
  • C
    $SO_{2_{(g)}}$
  • D
    $SO_{3_{(aq)}}^{2-}$

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