Which of the following structures represents the deoxyribonucleoside of cytosine?

Step-by-step solution

A nucleoside is composed of a nitrogenous base and a sugar (ribose or deoxyribose), without any phosphate group. A deoxyribonucleoside specifically contains a 2' -deoxyribose sugar, which lacks a hydroxyl ( -OH ) group at the 2' position. Cytosine is a pyrimidine base, which consists of a single six-membered ring with an amino group ( -NH₂ ) at the C4 position and a carbonyl group ( =O ) at the C2 position. Analyzing the given options: Option (A): Contains a phosphate group, making it a nucleotide. The base is guan