If $\log x:\log y:\log z = (y - z)\,:\,(z - x):(x - y)$ then

  • A

    ${x^y}.{y^z}.{z^x} = 1$

  • B

    ${x^x}{y^y}{z^z} = 1$

  • C

    $\root x \of x \,\root y \of y \root z \of z = 1$

  • D

    None of these

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