A stone of mass $1\mathrm{kg}$ is tied to end of a massless string of length $1 \mathrm{m}$. If the breaking tension of the string is $400 \mathrm{N}$, then maximum linear velocity, the stone can have without breaking the string, while rotating in horizontal plane, is:

• Correct answer
  A

  $20 \mathrm{m} {\mathrm{s}}^{-1}$
• B

  $40 \mathrm{m} {\mathrm{s}}^{-1}$
• C

  $400 \mathrm{m} {\mathrm{s}}^{-1}$
• D

  $10 \mathrm{m} {\mathrm{s}}^{-1}$

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