In the equation $y = pq$ $tan\,(qt)$, $y$ represents position, $p$ and $q$ are unknown physical quantities and $t$ is time. Dimensional formula of $p$ is

  • A

    ${L^{1}}{T^{ - 1}}$

  • B

    ${L^1}{T^1}$

  • C

    ${L^{ - 1}}{T^1}$

  • D

    ${L^{ - 1}}{T^{ - 1}}$

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