If $a,\,b,\,c$ are in $A.P.$ and ${a^2},\,{b^2},{c^2}$ are in $H.P.$, then

  • A

    $a \ne b \ne c$

  • B

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

  • C

    $a,\,b,\,c$ are in $G.P.$

  • D

    $\frac{{ - a}}{2},b,c$ are in $G.P$

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