The correct option is D ATP
During biological oxidation, energy is produced in the form of ATP. During the process of biological oxidation during which food is oxidized some ATP is released during the reactions. Also, during these reactions, some reducing equivalents such as NADH and FADH2 are produced. These reducing equivalents donate their electrons to the oxygen respired in, during which energy is released to produce adenosine triphosphate (ATP). So, the correct option is 'ATP'.