The correct options are
A Nucleic acids
B Leather
Biopolymers are polymers produced by living organisms. In other words, they are polymeric biomolecules. Since they are polymers, biopolymers contain monomeric units that are covalently bonded to form larger structures as given below:
Proteins, Carbohydrates, DNA, RNA, Lipids, Nucleic acids, Peptides, Polysaccharides (such as glycogen, starch and cellulose)
Leather.
Hence, nucleic acids and leather are biopolymers out of the given options.