The correct option is B ATP
Adenosine triphosphate (ATP) is an energy-rich molecule and energy is stored in the bonds by which phosphate groups are attached to each other. These molecules are stored in the cells. They are made up of a nitrogenous compound-adenine, pentose sugar- ribose and three phosphate groups. As per the need, energy is derived by breaking the phosphate bond of ATP; hence ATP is called as ‘energy currency’ of the cell.