Dimensional formula for activity of radioactive substance is

  • A
    $[M^0 L^0 T^{-1}]$
  • B
    $[M^0 L^{-1} T^0]$
  • C
    $[M^0 L^0 T^{-1}]$
  • D
    $[M^{-1} L^0 T^0]$

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