AIIMS 2018 Botany Carbohydrates MCQ Question

Option C is incorrect because DNA contains deoxyribose, which is a sugar derived from ribose by the loss of one oxygen atom, specifically at the 2' position, making it D-2-deoxyribose (not D-ribose). In contrast, options A and B are correct; fructose is indeed a reducing sugar due to its ability to donate electrons, and cellulose is composed of β-D-glucose units linked by β(1→4) glycosidic bonds, providing structural integrity to plant cell walls. Understanding these distinctions is crucial for grasping the biochemical properties of carbohydrates and nucleic acids.