A bomb of mass 16 kg at rest explodes into two pieces of masses $4\; kg$ and $12\; kg$. The velocity of the $12\; kg$ mass id $4\; m^{-1}$. The kinetic energy of the other mass is :

Question

( A ) 144 J
( B ) 96 J
( C ) 288 J
( D ) 96 J