Choose the $INCORRECT$ statement.

  • A
    Among the isotopes of carbon,${}^{13}C$ is a radioactive isotope.
  • B
    Carbon exhibits negative oxidation states along with $+4$ and $+2$.
  • C
    Carbon cannot exceed its covalency more than four.
  • D
    $CO_{2}$ is the most acidic oxide among the dioxides of group $14$ elements.

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