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 absorbed

(c) Energy = 3VT (1/r-1/R)  is released

(d) Energy is neither released nor absorbed

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