Let `veca,vecb,vecc` be three vectors such that `|veca|=|vecb|=|vecc|=4` and angle between `veca and vecb is pi/3` angle between `vecb and vecc` is `pi/3` and angle between `vecc and veca` is `pi/3`. The volume of the tetrhedron whose adjacent edges are represented by the vectors `veca,vecb and vecc` is (A) `(4sqrt(3))/2` (B) `(8sqrt(2))/3` (C) `16/sqrt(3)` (D) `(16sqrt(2))/3`