For a reaction scheme. $A\xrightarrow{{{k_1}}}B\xrightarrow{{{k_2}}}C$ if the rate of formation of $B$ is set to be zero then the concentration of $B$ is given by

  • [JEE MAIN 2019]
  • A

    $\left( {\frac{{{k_1}}}{{{k_2}}}} \right)\left[ A \right]$

  • B

    $\left( {{k_1} - {k_2}} \right)\left[ A \right]$

  • C

    ${k_1}{k_2}\left[ A \right]$

  • D

    $\left( {{k_1} + {k_2}} \right)\left[ A \right]$

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  • [IIT 1981]

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So the correct relation between $K$ and $K_1$ is