A long capillary tube of mass '$\mathrm{\pi }$' gm, radius 2 mm and negligible thickness, is partially immersed in a liquid of surface tension 0.1 N/m. Take angle of contact zero and neglect buoyant force of liquid. The force required to hold the tube vertically, will be ($\mathrm{g} = 10 \mathrm{m}/{\mathrm{s}}^2$)

• A

  10.4 $\mathrm{\pi mN}$

• B

  10.8 $\mathrm{\pi mN}$

• C

  0.8 $\mathrm{\pi mN}$

• D

  4.8 $\mathrm{\pi mN}$