Which molecule shown above contains a functional group that is a part of the molecule known as the "energy currency of living organisms"?

The energy currency of living organisms is ATP. It got its nickname due to its unique property of being the only compound that can transfer energy to maintain cellular activity. ATP is also known as adenosine triphosphate is made up of three different components, a sugar molecule at the center, a base of adenine and a string of phosphate groups. (see image attached). In order for ATP to produce energy, it first comes into contact with an enzyme that releases the endmost phosphate group on ATP when this reaction happens the energy gets released. From there, proteins are built among other things.

The category is the thing that is most simmilar throughout a period