The correct option is C Mitochondria
Mitochondria is the double membrane bound organelle which carries several enzymatic reactions such as Kreb's cycle and oxidative phosphorylation. They are, thus, rich in enzymes. Enzymes of Kreb's cycle and oxidative decarboxylation of pyruvic acid are present in the mitochondrial matrix. Succinate dehydrogenase enzyme of Kreb's cycle is present in the inner mitochondrial membrane. Enzymes for the synthesis of ATP through oxidative phosphorylation are present on the inner mitochondrial membrane. Enzymes for fatty acid biosynthesis are also present on the inner mitochondrial membrane.