A point P consider at contact point of a wheel on ground which rolls on ground without slipping then value of displacement of point P when wheel completes half of rotation (If radius of wheel is 1 m) :

• A

  2m

• B

  $\sqrt{{\mathrm{\pi }}^2+4}\mathrm{m}$

• C

  $\mathrm{\pi m}$

• D

  $\sqrt{{\mathrm{\pi }}^2+2}\mathrm{m}$