A certain number of spherical drops of a liquid of radius `r` coalesce to form a single drop of radius `R` and volume `V`. If `T` is the surface tension of the liquid, then

Options

A. energy `4VT ((1)/(r ) - (1)/(R))` is released
B. energy `3VT ((1)/(r ) + (1)/(R))` is absorbed
C. energy `3VT ((1)/(r ) - (1)/(R))` is released
D. energy is neither released nor absorbed

Answer

C