A parallel plate capacitor with air between the plates has a capacitance $C$. If the distance between the plates is doubled and the space between the plates is filled with a dielectric of dielectric constant $6$ , then the capacitance will become

  • A

    $3 C$

  • B

    $\frac{C}{3}$

  • C

    $12 C$

  • D

    $\frac{C}{6}$

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