if Energy is given by $U = \frac{{A\sqrt x }}{{{x^2} + B}},\,$, then dimensions of $AB$ is

  • A

    $ML^{7/2}T^{ - 2}$

  • B

    $M{L^{11/2}}{T^{ - 2}}$

  • C

    ${M^2}{L^{9/2}}{T^{ - 2}}$

  • D

    $M{L^{13/2}}{T^{ - 3}}$

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