This video explains about structure of Nucleotides and Nucleosides in Hindi.
Nucleotide= Nucleoside + P (Nucleoside= Nitrogenous base + Pentose Sugar. Nucleotides are of 2 types: Ribonucleotide & Deoxyribonucleotide.

Nitrogenous base are of 2 kinds: Purine (Adenine & Guanine) Pyrimidine ( Cytosine, Thymine & Uracil)