If the ${4^{th}},\;{7^{th}}$ and ${10^{th}}$ terms of a $G.P.$ be $a,\;b,\;c$ respectively, then the relation between $a,\;b,\;c$ is

  • A

    $b = \frac{{a + c}}{2}$

  • B

    ${a^2} = bc$

  • C

    ${b^2} = ac$

  • D

    ${c^2} = ab$

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