For a certain reaction, $10\%$ of the reactant dissociates in $1\, hour$, $20\%$ of the reactant dissociate in $2\, hour$, $30\%$ of the reactant dissociates in $3\, hour$. Then the units of rate constant is

  • A

    $hour^{-1}$

  • B

    $mol\, L^{-1}\, hour^{-1}$

  • C

    $L\, mol^{-1}\, sec^{-1}$

  • D

    $mol\, L\, sec^{-1}$

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