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Force $F$ is given in terms of time $t$ and distance $x$ by $F = a\, sin\, ct + b\, cos\, dx$, then the dimension of $a/b$ is
  • A$[M^0L^0T^0]$
  • B$[M^0L^1T^{-1}]$
  • C$[M^0L^1T^0]$
  • D$[M^1L^1T^{-2}]$
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