A sphere of radius $R$ and charge $Q$ is placed inside a concentric imaginary sphere of radius $2R$. The flux associated with the imaginary sphere is

  • A

    $\frac{Q}{{{\varepsilon _0}}}$

  • B

    $\frac{Q}{{{2\varepsilon _0}}}$

  • C

    $\frac{Q}{{{3\varepsilon _0}}}$

  • D

    $\frac{Q}{{{4\varepsilon _0}}}$

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  • [IIT 2001]