In a hydrogen atom,the distance between the electron and proton is $2.5 \times 10^{-11} \ m$. The electrical force of attraction between them will be

  • A
    $2.8 \times 10^{-7} \ N$
  • B
    $3.7 \times 10^{-7} \ N$
  • C
    $6.2 \times 10^{-7} \ N$
  • D
    $9.1 \times 10^{-7} \ N$

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