Correct Option: A

Deoxyribonucleic acid (DNA) molecules are informational molecules encoding the genetic instructions used in the development and functioning of all known living organisms and many viruses. DNA is one of the three major macromolecules that are essential for all known forms of life. Genetic information is encoded as a sequence of nucleotides (guanine, adenine, thymine, and cytosine) recorded using the letters G, A, T, and C. DNA is well-suited for biological information storage, since the DNA backbone is resistant to cleavage and the doublestranded structure provides the molecule with a builtin duplicate of the encoded information.