Two nucleotides are bound together by…

✅Explanation: A phosphodiester bond is a covalent bond that links the 3' carbon atom of one sugar molecule (deoxyribose in DNA or ribose in RNA) to the 5' carbon atom of another sugar molecule through a phosphate group. This bond is essential for the formation of the sugar-phosphate backbone of nucleic acid strands.

📌 Other Options Explanations:
-(A) Glycosidic bond: This bond connects a sugar molecule to a nitrogenous base in a nucleotide.
-(B) H-bond: Hydrogen bonds hold complementary base pairs together in the DNA double helix.
-(D) C-bond: Carbon bonds are the basic building blocks of organic molecules.

🔑Key Points:
Phosphodiester bonds hold the DNA molecule together, making it a continuous structure. They join the 5' carbon atom of one deoxyribose sugar to the 3' carbon atom of the next deoxyribose sugar, creating the backbone of the DNA molecule