The correct option is D All of these
A nucleotide is an organic molecule consisting of a nucleoside and a phosphate. It serves as the monomeric unit of the nucleic acid polymers DNA and RNA, which are involved in information transfer between generations and for the formation of proteins.
ATP is a nucleotide which is the energy currency of the cell. It is involved in reactions involving energy transfer.
Nucleotides also form parts of the molecules NAD+ and FAD, which act as coenzymes of oxidizing enzymes.