જો $\frac{\log _{2} x}{3}=\frac{\log _{2} y}{4}=\frac{\log _{2} z}{5 k}$ અને $\frac{z}{x^{3} y^{4}}=1$ હોય,તો $k=$

  • A
    $3$
  • B
    $4$
  • C
    $5$
  • D
    $-5$

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