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
(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.