If $a,\;b,\;c$ are ${p^{th}},\;{q^{th}}$ and ${r^{th}}$ terms of a $G.P.$, then ${\left( {\frac{c}{b}} \right)^p}{\left( {\frac{b}{a}} \right)^r}{\left( {\frac{a}{c}} \right)^q}$ is equal to

  • A

    $1$

  • B

    ${a^p}{b^q}{c^r}$

  • C

    ${a^q}{b^r}{c^p}$

  • D

    ${a^r}{b^p}{c^q}$

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