Which of the following statements is incorrect?

  • A
    $B.P.$ of $o-$nitrophenol is greater than $p-$nitrophenol
  • B
    In $SO_3$,$p\pi-d\pi$ bond is present
  • C
    In $S_3O_9$,the number of bridging oxygen atoms is $3$
  • D
    All of these

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