In thermodynamic process pressure of a fixed mass of gas is changed in such a manner that the gas releases $30$ joule of heat and $18$ joule of work was done on the gas. If the initial internal energy of the gas was $60$ joule, then, the final internal energy will be  ..... $J$

  • A

    $32$

  • B

    $48$

  • C

    $72$

  • D

    $96$

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