Water rises to a height 0f 10 cm in a capillary tube, and mercuryfalls to a depth of 3.42 cm in the same capillary tube. IF the density of mercury is 13.6 and the angle of contact is `135^(@)`, the ratio of surface tension for water and mercury is

Options

A. `1:0.5`
B. `1:3`
C. `1:6.5`
D. `1.5:1`

Answer

C