The correct answer is option 1: a nitrogenous base, deoxyribose sugar, and phosphate group.
In DNA, the building blocks of the nucleotide are composed of three main components: a nitrogenous base, a deoxyribose sugar, and a phosphate group. The nitrogenous base can be adenine (A), thymine (T), cytosine (C), or guanine (G). The deoxyribose sugar is a five-carbon sugar molecule that provides the backbone of the DNA strand. Lastly, the phosphate group is a molecular group consisting of phosphorus and oxygen atoms.
Option 2 is incorrect because it mentions ribose sugar instead of deoxyribose sugar. Ribose sugar is present in RNA, not DNA.
Option 3 is incorrect because it mentions both ribose sugar and deoxyribose sugar, which is not accurate.
Option 4 is incorrect because it mentions a nitrogenous base and a phosphate group only, omitting the essential deoxyribose sugar component.
Therefore, the correct answer is option 1: a nitrogenous base, deoxyribose sugar, and phosphate group.