Longitudinal stress of  $1\mathrm{kg}/{\mathrm{mm}}^2$ is applied on a wire. The percentage increase in length is  $(\mathrm{Y}={10}^{11}\mathrm{N}/{\mathrm{m}}^2)$

• A

  0.002

• B

  0.001

• C

  0.003

• D

  0.01