If $L,\,C$ and $R$ represent inductance, capacitance and resistance respectively, then which of the following does not represent dimensions of frequency
  • A$\frac{1}{{RC}}$
  • B$\frac{R}{L}$
  • C$\frac{1}{{\sqrt {LC} }}$
  • D$\frac{C}{L}$
IIT 1984, Medium
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