Young's modulus of a wire of length land radius r is Y. Length of the wire is reduced to $\frac{\mathrm{l}}{2}$ and radius also reduced to $\frac{\mathrm{r}}{2}$.Young's modulus will now be

• A

  $\frac{\mathrm{Y}}{4}$

• B

  $\frac{\mathrm{Y}}{2}$

• C

  2Y

• D

  Y