A uniform spherical planet (Radius $R$) has acceleration due to gravity at its surface $g.$ Points $P$ and $Q$ located inside and outside the planet have acceleration due to gravity $\frac{g}{4} .$ Maximum possible separation between $P$ and $Q$ is

  • A

    $\frac{{7R}}{4}$

  • B

    $\frac{{3R}}{4}$

  • C

    $\frac{{9R}}{4}$

  • D

    none

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  • [AIIMS 2012]