Terminal velocity of a steel sphere of radius r in a viscous liquid of density $\mathrm{\rho }$ and coefficient of viscosity $\mathrm{\eta }$  is v. What will be the terminal velocity of a steel sphere of radius 2r in another viscous liquid of density $\mathrm{\rho }$ and coefficient of viscosity $2\mathrm{\eta }$ ?

• A

  $\frac{\mathrm{v}}{4}$

• B

  4v

• C

  $\frac{\mathrm{v}}{\mathrm{L}}$

• D

  2v