Sixty four conducting drops each of radius $0.02 m$ and each carrying a charge of $5 \,\mu C$ are combined to form a bigger drop. The ratio of surface density of bigger drop to the smaller drop will be ............

  • [JEE MAIN 2022]
  • A

    $1: 4$

  • B

    $4: 1$

  • C

    $1: 8$

  • D

    $8: 1$

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