Which of the following statements is incorrect?

  • A
    $MnO_2$ acts as a catalyst for the decomposition of $KClO_3$ to $O_2$.
  • B
    The conversion of $SO_2$ to $SO_3$ is an exothermic reaction in the contact process.
  • C
    White phosphorus has a garlic-like odor and is poisonous in nature.
  • D
    $\gamma-SO_3$ has a chain structure.

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