A capillary tube of radius `r` is lowered into water whose surface tension is `alpha` and density `d`. The liquid rises to a height. Assume that the contact angle is zero. Choose the correct statement (s):

Options

A. Magnitude of work done by force of surface tension is `(4pialpha^2)/(dg)`
B. Magnitude of work done alone by force of surface tension is `(2piapha^2)/(dg)`
C. Potential energy required by water is `(2pialpha^2)/(dg)`
D. The amount of heat developed is `(2pialpha^2)/(dg)`

Answer

B