The correct option is D Lipids
Nucleic acids, proteins and polysaccharides are polymeric in nature which means they are made up of similar repeating units called monomers linked together. Nucleic acids are polymers of nucleotides (polynucleotides) joined together by phosphodiester bonds.
Proteins are polymers of amino acids joined together by peptide bonds (polypeptides).
Polysaccharides are polymers of monosaccharides that are joined together by glycosidic bonds.
Lipids are made up of simple fatty acids or compounds of glycerol with fatty acids which cannot be considered as polymers because they are not repeating units of a monomer.