The correct option is B Mitochondria
Mitochondria plays an important role in respiratory cycles and energy production and are sometimes called as the power houses of the cell. It contains maximum types of respiratory substrate. Mitochondria supply most or the necessary biological energy through reduction of NADP. A dominant role for the mitochondria is the production of ATP. This is done by oxidizing the major products of glucose, pyruvate, and NADH, which are produced in the cytosol.