The answer is letter C. ATP.
ATP stands for Adenosine Triphosphate which is present in every cell’s
cytoplasm and nucleoplasm which is essential in all the physiological
mechanisms. It is considered as the energy currency of life or the “molecular
unit of currency”. It stores the energy
that we need every day to do our daily undertakings. The primary function of
ATP is to transport chemical energy within the body cells for metabolism. It is
said that 1 moleculte of ATP is composed of 3 phosphate groups.