Right answer is (d) Acetate kinase
Best explanation: The coenzyme regeneration of ATP by acetate kinase is shown in the diagram. Acetate kinase is an example for regeneration of the derivatized coenzymes by enzymic means. This is an advantageous process because of highly specific nature of enzymes. In this process, cheap substrate such as acetyl phosphate and readily available enzyme acetate kinase is used. This particular process gives non-interfering and easily separated products such as dextran ADP, acetic acid, product AOPO3^-2 etc.