An ideal gas is expanding such that ${PT}^{3}=$ constant. The coefficient of volume expansion of the gas is:

  • [JEE MAIN 2021]
  • A

    $\frac{1}{{T}}$

  • B

    $\frac{2}{{T}}$

  • C

    $\frac{4}{{T}}$

  • D

    $\frac{3}{{T}}$

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