A certain number of spherical drops of a liquid of radius \( r \) coalesce to form a single drop...

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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 \( =4 V T\left(\frac{1}{r}-\frac{1}{R}\right) \) is released
(b) energy \( =3 V T\left(\frac{1}{r}+\frac{1}{R}\right) \) is absorbed
(c) energy \( =3 V T\left(\frac{1}{r}-\frac{1}{R}\right) \) is released
(d) energy is neither released nor absorbed.
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