The dimension of $P = \frac{{{B^2}{l^2}}}{m}$ is 

where $B=$ magnetic field, $l=$ length, $m =$ mass

  • A

    $ML{T^{ - 3}}$

  • B

    $M{L^2}{T^{ - 4}}I^{-2}$

  • C

    ${M^2}{L^2}{T^{ - 4}}I$

  • D

    $ML{T^{ - 2}}{I^{ - 2}}$

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