Identify the structure of the deoxyribonucleoside of adenine (deoxyadenosine).

Step-by-step solution

Deoxyadenosine is a deoxyribonucleoside, which means it consists of a nitrogenous base (adenine) and a sugar (2'-deoxyribose), but lacks a phosphate group. Let us analyze the given options: Option (A) shows an adenine base attached to a 2'-deoxyribose sugar. The sugar is identified as 2'-deoxyribose because it lacks a hydroxyl ( -OH ) group at the 2' carbon position. This structure represents deoxyadenosine. Option (B) represents only the nitrogenous base, adenine. Option (C) shows a thymine base attached to a deox