The large organic molecules are synthesized from the multiple smaller units that are combined together. These units are identical and are repeated a certain number of times to form these different large molecules. These individual units are known as monomers, and together by combining they form the polymer units. The monomer of the carbohydrates is monosaccharide, that of protein is amino acid, and the monomer of nucleic acid is nucleotides.
Hence, the correct answer is 'all of the above'.
