A ring of linear mass density $2\mathrm{\lambda }$  and radius R is rotated about its axis passing through its centre and perpendicular to plane of ring with constant angular speed ‘$\mathrm{\omega }$ ’. The tension in the ring is 

• A

  $2{\mathrm{\lambda \omega }}^2{\mathrm{R}}^2$

• B

  $\left({\mathrm{\lambda \omega }}^2{\mathrm{R}}^2\right)/2$

• C

  ${\mathrm{\lambda \omega }}^2{\mathrm{R}}^2/8$

• D

  ${\mathrm{\lambda \omega }}^2{\mathrm{R}}^2$