If ${p^{th}},\;{q^{th}},\;{r^{th}}$ and ${s^{th}}$ terms of an $A.P.$ be in $G.P.$, then $(p - q),\;(q - r),\;(r - s)$ will be in

  • A

    $G.P.$

  • B

    $A.P.$

  • C

    $H.P.$

  • D

    None of these

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