The correct answer is option 4 - Deoxyribonucleic acid. DNA stands for Deoxyribonucleic acid, which is a molecule found in the cells of all living organisms. It contains the genetic instructions for the development, functioning, and reproduction of the organism.
Option 1, Diribo nucleic acid, is not the correct full form of DNA. It is a spelling error and should be disregarded.
Option 2, Di nucleic acid, is also incorrect. While DNA is a nucleic acid, it stands for Deoxyribonucleic acid and not Di nucleic acid.
Option 3, Dual nitrogen acid, is not the correct full form of DNA either. Again, it is a spelling error and should not be considered as the correct answer.
It is important to note that DNA is composed of two strands that are made up of nucleotides, which consist of a sugar molecule (deoxyribose), a phosphate group, and a nitrogenous base (adenine, thymine, cytosine, or guanine). These two strands are paired together by hydrogen bonds to form a double helix structure. DNA carries the genetic information that determines the traits and characteristics of an organism.