Work done in splitting a drop of water of 1 mm radius into 64 droplets is (Surface tension of water is 72 x 10⁻³ J/m² )
(A) 2.0 x 10⁻⁶ J
(B) 2.7 x 10⁻⁶ J
(C) 4 x 10⁻⁶ J
(D) 5.4 x 10⁻⁶ J