A force defined by $F=\alpha t^2+\beta t$ acts on a particle at a given time $t$. The factor which is dimensionless, if $\alpha$ and $\beta$ are constants, is:

  • [NEET 2024]
  • A

    $\alpha t / \beta$

  • B

    $\alpha \beta t$

  • C

    $\alpha \beta / t$

  • D

    $\beta t / \alpha$

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