When water rises in a capillary tube of radius r to a height h, its potential energy is `U_1`. If capillary tube of radius 2r is dipped in water, then potential energy of risen water is `U_2`. Then `U_1 :U_2` will be

Options

A. `1:1`
B. `1:2`
C. `2:1`
D. `1:4`

Answer

A