Let $S_{n}$ be the sum of the first $n$ terms of an arithmetic progression. If $S_{3 n}=3 S_{2 n}$, then the value of $\frac{S_{4 n}}{S_{2 n}}$ is:

  • [JEE MAIN 2021]
  • A

    $4$

  • B

    $6$

  • C

    $8$

  • D

    $2$

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