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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 ' \( \mathrm{V} \) '. If ' \( T \) ' is the surface tension of the liquid, then :
(a) energy \( =4 \mathrm{VT}\left(\frac{1}{\mathrm{r}}-\frac{1}{\mathrm{R}}\right) \) is released
(b) energy \( =3 \mathrm{VT}\left(\frac{1}{\mathrm{r}}+\frac{1}{\mathrm{R}}\right) \) is absorbed
(c) energy \( =3 \mathrm{VT}\left(\frac{1}{\mathrm{r}}-\frac{1}{\mathrm{R}}\right) \) is released
(d) energy is neither released nor absorbed
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