What are the full forms of DNA and RNA?

The correct answer, which identifies the full forms of DNA and RNA, is rooted in the chemical structures and components of these crucial molecules in biology. DNA stands for Deoxyribonucleic Acid, which highlights its structure containing deoxyribose sugar, phosphates, and nitrogenous bases. RNA stands for Ribonucleic Acid, indicating its ribose sugar, also with phosphates and nitrogenous bases.

The first option accurately reflects the fundamental molecular characteristics that distinguish DNA and RNA, making it clear and precise in scientific nomenclature. Understanding these full forms is important because they provide insight into the roles these nucleic acids play in genetics, cellular function, and heredity.

Other options present incorrect or non-standard terms. For instance, "Deoxyribonuclear Acid" and "Ribonuclear Acid" misrepresent the biological terminology, while "Dimethyl Acid" is unrelated to either DNA or RNA. Such inaccuracies can lead to confusion regarding the essential roles of these molecules in living organisms.