What does DNA stand for?

DNA stands for Deoxyribonucleic acid. This term accurately reflects the structure and components of the molecule. It is made up of deoxyribonucleotides, which consist of a deoxyribose sugar, a phosphate group, and a nitrogenous base. The name highlights both the sugar component, deoxyribose, and the type of acid, nucleic acid, that forms the backbone of the DNA molecule.

The other options do not correctly represent the structure or components of DNA. For instance, "Deoxyribose nucleic acid" omits the necessary 'acid' designation that defines it as a nucleic acid. "Dextrose ribonucleic acid" incorrectly identifies dextrose, which is a form of glucose and not the sugar present in DNA, while also using 'ribonucleic' which refers instead to RNA. "Dicetyl ribonucleic acid" is a made-up term and does not relate to the known structure of DNA at all.