Three capacitors each of $4\,\,\mu F$  are to be connected in such a way that the effective capacitance is $6\,\,\mu F.$  This can be done by connecting thern
  • A
    all in series
  • B
    all in parallel
  • C
    two in parallel and one in series
  • D
    two in series and one in parallel
JEE MAIN 2016, Diffcult
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