Two point charges $+3 \mu C$ and $+8 \mu C$ repel each other with a force of $40 \mathrm{~N}$. If a charge of $-5 \mu \mathrm{C}$ is added to each of them, then the force between them will become

• Correct answer
  A

  $-10 \mathrm{~N}$
• B

  $+10 \mathrm{~N}$
• C

  $+20 \mathrm{~N}$
• D

  $-20 \mathrm{~N}$

Hence, the correct answer is option: 'A'.