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 :

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

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