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:

Question

( A ) Energy = $3VT (\frac{1}{r} - \frac{1}{R})$ is released
( B ) Energy is neither released nor absorbed
( C ) Energy = $3VT (\frac{1}{r} + \frac{1}{R})$ is released
( D ) Energy = $4VT (\frac{1}{r} - \frac{1}{R})$ is released