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 released
c.Energy = 3VT (1/r - 1/R) is released
d.Energy is neither released nor absorbed