The correct answer is C. Organic molecule.
Step-by-step explanation
An organic molecule is a chemical compound that can contain carbon, oxygen, nitrogen, sulfur, among other elements. One of the chemical compounds that can be produced by the union of chemical elements are nucleotides, consisting of five carbons, a nitrogenous base, and a phosphate group. Likewise, when several nucleotides are linked they form longer and more complex chains such as nucleic acids, such as DNA or RNA, where genetic information of living organisms is stored. According to the above, DNA is a complex example of organic molecules. So, the correct answer is B. Organic molecule.