Oxysome of mitochondria are concerned with oxidative phosphorylation.
The inner membrane of mitochondria has oxysomes. Through the process of oxidative phosphorylation, oxysomes takes part in the synthesis of ATP. The oxysomes are also called as ATP synthase. The F0 part functin as proton tunnels. The stalk part of an elementary particle has coupling factors while heads contain ATP as for the synthesis of ATP.
So, the correct option is (b)