A water drop of diameter cm is broken into 64 equal droplets. The surface tension of water is 0.075 N/m. In this process the gain in surface energy will be :
(A) 2.8 x 10⁻⁴ J
(B) 1.5 x 10⁻⁴ J
(C) 1.9 x 10⁻⁴ J
(D) 9.4 x 10⁻⁵ J