Answer:
A.
Deoxyribonucleic Acid (DNA) as it have double helix structure with deoxyribose sugar attached to phosphate molecule with ester bond and nitrogen base with glycosidic bond.
B.
1. Phosphate molecule
2. Adenine (A)
3. Cytosine (C)
4. Sugar molecule
5. Guanine (G)
6. Thymine (T)
C.
1. Adenine (A)
2. Thymine (T)
3. Guanine (G)
4. Cytosine (C)